[Android Q&A, Help & Troubleshooting] :
I didn't have this problem before, but it suddenly happened now. I finally got the GSI rom of LineageOS up and running, but I had a problem: I couldn't use Snapchat. Now, there is a work-around, which is that on stock Android you can log in to Snapchat, do a backup with Titanium and then restore it in the GSI rom and that would fix it. And it did! Boom! Fixed! Then, I realized that my banking apps ALSO needed Google Play Services, and I don't want that installed on my device. So, I went to TWRP and decided to do a backup so that I could go to stock android again and do the same thing I did with Snapchat with my two banking apps.

In TWRP, when I go to do the backup, I get an error:

"createTarFork() process ended with ERROR: 255"

This has happened multiple times, so I am not sure what to do to fix this. I will also paste the recovery log in the end of the post.

I googled the error and found that the Oneplus community has had problems with this as well, and their fix is going in the terminal, typing "su" to get root, and then type "pm remove-user 999". Normally, it would say the user was deleted successfully, but for me it just said that it was unable to delete user 999, so that doesn't work.

Here is the recovery log:

Starting TWRP 3.3.1-0-72d75b0b on Wed Jan 22 18:34:12 2020

(pid 3582)

TW_NO_REBOOT_BOOTLOADER := true

RECOVERY_SDCARD_ON_DATA := true

I:Lun file '/sys/class/android_usb/android0/f_mass_storage/lun0/file' does not exist, USB storage mode disabled

TW_HAS_DOWNLOAD_MODE := true

I:TW_BRIGHTNESS_PATH := /sys/class/backlight/panel/brightness

I:Found brightness file at '/sys/class/backlight/panel/brightness'

I:TWFunc::Set_Brightness: Setting brightness control to 16300

I:LANG: en

Starting the UI...

setting DRM_FORMAT_ABGR8888 and GGL_PIXEL_FORMAT_BGRA_8888, GGL_PIXEL_FORMAT may not match!

cannot find/open a drm device: No such file or directory

fb0 reports (possibly inaccurate):

vi.bits_per_pixel = 32

vi.red.offset = 16 .length = 8

vi.green.offset = 8 .length = 8

vi.blue.offset = 0 .length = 8

setting GGL_PIXEL_FORMAT_BGRA_8888

double buffered

framebuffer: 0 (1080 x 2340)

Using fbdev graphics.

I:TWFunc::Set_Brightness: Setting brightness control to 16300

I:Loading package: splash (/twres/splash.xml)

I:Load XML directly

I:PageManager::LoadFileToBuffer loading filename: '/twres/splash.xml' directly

I:Checking resolution...

I:Scaling theme width 1.000000x and height 1.177083x, offsets x: 0 y: 80 w: 0 h: -80

I:Loading resources...

I:Loading variables...

I:Loading mouse cursor...

I:Loading pages...

I:Loading page splash

I:Switching packages (splash)

=> Linking mtab

=> Processing /etc/recovery.fstab

I:Reading /etc/recovery.fstab

I:Processing '/modem'

I:Processing '/boot'

I:Processing '/cache'

I:Processing '/data'

I:Processing '/efs'

I:Created '/efs' folder.

I:Processing '/system_root'

I:Processing '/system_image'

I:Processing '/vendor'

I:Created '/vendor' folder.

I:Processing '/vendor_image'

I:Processing '/recovery'

I:Processing '/misc'

I:Processing '/external_sd'

I:Created '/external_sd' folder.

I:Processing '/usb-otg'

I:Created '/usb-otg' folder.

I:Done processing fstab files

I:Setting up '/data' as data/media emulated storage.

I:mount -o bind '/data/media' '/sdcard' process ended with RC=0

I:mount -o bind '/data/media/0' '/sdcard' process ended with RC=0

I:Backup folder set to '/data/media/0/TWRP/BACKUPS/R58MA7L9B2B'

I:Settings storage is '/data/media/0'

Updating partition details...

I:Data backup size is 1358MB, free: 50180MB.

I:Unable to mount '/external_sd'

I:Actual block device: '', current file system: 'vfat'

I:Unable to mount '/usb-otg'

I:Actual block device: '', current file system: 'vfat'

...done

I:Unmounting main partitions...

Partition Logs:

/modem | /dev/block/mmcblk0p19 | Size: 45MB

Flags: Can_Be_Backed_Up IsPresent

Primary_Block_Device: /dev/block/mmcblk0p19

Display_Name: Modem Firmware

Storage_Name: Modem Firmware

Backup_Path: /modem

Backup_Name: modem

Backup_Display_Name: Modem Firmware

Storage_Path: /modem

Current_File_System: emmc

Fstab_File_System: emmc

Backup_Method: dd

/boot | /dev/block/mmcblk0p15 | Size: 36MB

Flags: Can_Be_Backed_Up IsPresent Can_Flash_Img

Primary_Block_Device: /dev/block/mmcblk0p15

Display_Name: Boot

Storage_Name: boot

Backup_Path: /boot

Backup_Name: boot

Backup_Display_Name: Boot

Storage_Path: /boot

Current_File_System: emmc

Fstab_File_System: emmc

Backup_Method: dd

/cache | /dev/block/mmcblk0p28 | Size: 371MB Used: 0MB Free: 371MB Backup Size: 0MB

Flags: Can_Be_Mounted Can_Be_Wiped Can_Be_Backed_Up Wipe_During_Factory_Reset Wipe_Available_in_GUI IsPresent

Primary_Block_Device: /dev/block/mmcblk0p28

Display_Name: Cache

Storage_Name: Cache

Backup_Path: /cache

Backup_Name: cache

Backup_Display_Name: Cache

Storage_Path: /cache

Current_File_System: ext4

Fstab_File_System: ext4

Backup_Method: files

/data | /dev/block/mmcblk0p32 | Size: 51730MB Used: 1358MB Free: 50180MB Backup Size: 1358MB

Flags: Can_Be_Mounted Can_Be_Wiped Can_Be_Backed_Up Wipe_During_Factory_Reset Wipe_Available_in_GUI IsPresent Has_Data_Media Can_Encrypt_Backup Use_Userdata_Encryption Is_Storage Is_Settings_Storage

Symlink_Path: /data/media/0

Symlink_Mount_Point: /sdcard

Primary_Block_Device: /dev/block/mmcblk0p32

Display_Name: Data

Storage_Name: Internal Storage

Backup_Path: /data

Backup_Name: data

Backup_Display_Name: Data

Storage_Path: /data/media/0

Current_File_System: ext4

Fstab_File_System: ext4

Backup_Method: files

MTP_Storage_ID: 65537

/efs | /dev/block/mmcblk0p3 | Size: 15MB Used: 2MB Free: 12MB Backup Size: 2MB

Flags: Can_Be_Mounted Can_Be_Wiped Can_Be_Backed_Up IsPresent

Primary_Block_Device: /dev/block/mmcblk0p3

Display_Name: EFS

Storage_Name: EFS

Backup_Path: /efs

Backup_Name: efs

Backup_Display_Name: EFS

Storage_Path: /efs

Current_File_System: ext4

Fstab_File_System: ext4

Backup_Method: files

/system_root | /dev/block/mmcblk0p25 | Size: 1794MB Used: 1730MB Free: 64MB Backup Size: 1730MB

Flags: Can_Be_Mounted Can_Be_Wiped Wipe_Available_in_GUI IsPresent Mount_Read_Only

Primary_Block_Device: /dev/block/mmcblk0p25

Display_Name: System

Storage_Name: System

Backup_Path: /system_root

Backup_Name: system_root

Backup_Display_Name: System

Storage_Path: /system_root

Current_File_System: ext4

Fstab_File_System: ext4

Backup_Method: files

/system_image | /dev/block/mmcblk0p25 | Size: 4920MB

Flags: Can_Be_Backed_Up IsPresent Can_Flash_Img

Primary_Block_Device: /dev/block/mmcblk0p25

Display_Name: System Image

Storage_Name: system_image

Backup_Path: /system_image

Backup_Name: system_image

Backup_Display_Name: System Image

Storage_Path: /system_image

Current_File_System: emmc

Fstab_File_System: emmc

Backup_Method: dd

/vendor | /dev/block/mmcblk0p26 | Size: 635MB Used: 324MB Free: 311MB Backup Size: 324MB

Flags: Can_Be_Mounted Can_Be_Wiped IsPresent Mount_Read_Only

Primary_Block_Device: /dev/block/mmcblk0p26

Display_Name: Vendor

Storage_Name: Vendor

Backup_Path: /vendor

Backup_Name: vendor

Backup_Display_Name: Vendor

Storage_Path: /vendor

Current_File_System: ext4

Fstab_File_System: ext4

Backup_Method: files

/vendor_image | /dev/block/mmcblk0p26 | Size: 656MB

Flags: Can_Be_Backed_Up IsPresent Can_Flash_Img

Primary_Block_Device: /dev/block/mmcblk0p26

Display_Name: Vendor Image

Storage_Name: vendor_image

Backup_Path: /vendor_image

Backup_Name: vendor_image

Backup_Display_Name: Vendor Image

Storage_Path: /vendor_image

Current_File_System: emmc

Fstab_File_System: emmc

Backup_Method: dd

/recovery | /dev/block/mmcblk0p16 | Size: 53MB

Flags: Can_Be_Backed_Up IsPresent Can_Flash_Img

Primary_Block_Device: /dev/block/mmcblk0p16

Display_Name: Recovery

Storage_Name: recovery

Backup_Path: /recovery

Backup_Name: recovery

Backup_Display_Name: Recovery

Storage_Path: /recovery

Current_File_System: emmc

Fstab_File_System: emmc

Backup_Method: dd

/misc | /dev/block/mmcblk0p14 | Size: 2MB

Flags: IsPresent

Primary_Block_Device: /dev/block/mmcblk0p14

Display_Name: Misc

Storage_Name: Misc

Backup_Path: /misc

Backup_Name: misc

Backup_Display_Name: Misc

Storage_Path: /misc

Current_File_System: emmc

Fstab_File_System: emmc

Backup_Method: dd

/external_sd | | Size: 0MB Used: 0MB Free: 0MB Backup Size: 0MB

Flags: Can_Be_Mounted Can_Be_Wiped Wipe_Available_in_GUI Removable Is_Storage

Primary_Block_Device: /dev/block/mmcblk1p1

Alternate_Block_Device: /dev/block/mmc1k1p1

Display_Name: Micro SDcard

Storage_Name: Micro SDcard

Backup_Path: /external_sd

Backup_Name: external_sd

Backup_Display_Name: Micro SDcard

Storage_Path: /external_sd

Current_File_System: vfat

Fstab_File_System: vfat

Backup_Method: files

MTP_Storage_ID: 65538

/usb-otg | | Size: 0MB Used: 0MB Free: 0MB Backup Size: 0MB

Flags: Can_Be_Mounted Can_Be_Wiped Wipe_Available_in_GUI Removable Is_Storage

Primary_Block_Device: /dev/block/sdf1

Alternate_Block_Device: /dev/block/sdf

Display_Name: USB-OTG

Storage_Name: USB-OTG

Backup_Path: /usb-otg

Backup_Name: usb-otg

Backup_Display_Name: USB-OTG

Storage_Path: /usb-otg

Current_File_System: vfat

Fstab_File_System: vfat

Backup_Method: files

MTP_Storage_ID: 65539

I:Loading package: TWRP (/data/media/0/TWRP/theme/ui.zip)

I:Loading zip theme

I:Loading package: TWRP (/twres/ui.xml)

I:Load XML directly

I:PageManager::LoadFileToBuffer loading filename: '/twres/languages/zh_TW.xml' directly

I:PageManager::LoadFileToBuffer loading filename: '/twres/languages/zh_CN.xml' directly

I:PageManager::LoadFileToBuffer loading filename: '/twres/languages/uk.xml' directly

I:PageManager::LoadFileToBuffer loading filename: '/twres/languages/tr.xml' directly

I:PageManager::LoadFileToBuffer loading filename: '/twres/languages/sv.xml' directly

I:PageManager::LoadFileToBuffer loading filename: '/twres/languages/sl.xml' directly

I:PageManager::LoadFileToBuffer loading filename: '/twres/languages/sk.xml' directly

I:PageManager::LoadFileToBuffer loading filename: '/twres/languages/ru.xml' directly

I:PageManager::LoadFileToBuffer loading filename: '/twres/languages/pt_PT.xml' directly

I:PageManager::LoadFileToBuffer loading filename: '/twres/languages/pt_BR.xml' directly

I:PageManager::LoadFileToBuffer loading filename: '/twres/languages/pl.xml' directly

I:PageManager::LoadFileToBuffer loading filename: '/twres/languages/nl.xml' directly

I:PageManager::LoadFileToBuffer loading filename: '/twres/languages/ja.xml' directly

I:PageManager::LoadFileToBuffer loading filename: '/twres/languages/it.xml' directly

I:PageManager::LoadFileToBuffer loading filename: '/twres/languages/hu.xml' directly

I:PageManager::LoadFileToBuffer loading filename: '/twres/languages/fr.xml' directly

I:PageManager::LoadFileToBuffer loading filename: '/twres/languages/es.xml' directly

I:PageManager::LoadFileToBuffer loading filename: '/twres/languages/en.xml' directly

I:PageManager::LoadFileToBuffer loading filename: '/twres/languages/el.xml' directly

I:PageManager::LoadFileToBuffer loading filename: '/twres/languages/de.xml' directly

I:PageManager::LoadFileToBuffer loading filename: '/twres/languages/cz.xml' directly

I:PageManager::LoadFileToBuffer loading filename: '/twres/languages/en.xml' directly

parsing languageFile

parsing languageFile done

I:PageManager::LoadFileToBuffer loading filename: '/twres/ui.xml' directly

I:Checking resolution...

I:Scaling theme width 1.000000x and height 1.177083x, offsets x: 0 y: 80 w: 0 h: -80

I:Loading resources...

I:Failed to load image from indeterminate013, error -1

I:Loading variables...

I:Loading mouse cursor...

I:Loading pages...

I:Including file: /twres/portrait.xml...

I:PageManager::LoadFileToBuffer loading filename: '/twres/portrait.xml' directly

I:Loading resources...

I:Loading variables...

I:Loading mouse cursor...

I:Loading pages...

I:Loading page main

I:Loading page main2

I:Loading page install

I:Loading page flash_confirm

I:Loading page flash_zip

I:Loading page flash_done

I:Loading page flash_sleep_and_reboot

I:Loading page flashimage_confirm

I:Loading page clear_vars

I:Loading page reboot_system_routine

I:Loading page confirm_action

I:Loading page action_page

I:Loading page singleaction_page

I:Loading page action_complete

I:Loading page filecheck

I:Loading page rebootcheck

I:Loading page appcheck

I:Loading page wipe

I:Loading page advancedwipe

I:Loading page formatdata

I:Loading page formatdata_confirm

I:Loading page checkpartitionlist

I:Loading page partitionoptions

I:Loading page refreshfilesystem

I:Loading page selectfilesystem

I:Loading page backup

I:Loading page backup_options

I:Loading page backupname1

I:Loading page backupname2

I:Loading page backupencryption

I:Loading page backupencryption2

I:Loading page checkbackuppassword

I:Loading page backup_run

I:Loading page restore

I:Loading page restore_read

I:Loading page restore_decrypt

I:Loading page try_restore_decrypt

I:Loading page restore_select

I:Loading page renamebackup

I:Loading page restore_run

I:Loading page mount

I:Loading page usb_mount

I:Loading page usb_umount

I:Loading page system_readonly_check

I:Loading page reboot

I:Loading page rebootapp

I:Loading page system_readonly

I:Loading page settings

I:Loading page settings_timezone

I:Loading page settings_screen

I:Loading page settings_vibration

I:Loading page settings_language

I:Loading page copylog

I:Loading page advanced

I:Loading page partsdcardsel

I:Loading page partsdcardcheck

I:Loading page partsdcard

I:Loading page htcdumlock

I:Loading page repackselect

I:Loading page repackconfirm

I:Loading page lock

I:Loading page filemanagerlist

I:Loading page filemanageroptions

I:Loading page choosedestinationfolder

I:Loading page filemanagerrenamefile

I:Loading page filemanagerrenamefolder

I:Loading page filemanagerchmod

I:Loading page filemanagerconfirm

I:Loading page filemanageraction

I:Loading page decrypt

I:Loading page decrypt_pattern

I:Loading page trydecrypt

I:Loading page terminalcommand

I:Loading page sideload

I:Loading page fixcontexts

I:Loading page slideout

I:Loading page select_storage

I:Loading page select_language

I:Set page: 'clear_vars'

I:Set page: 'main2'

I:Switching packages (TWRP)

Startup Commands:

ro.boottime.adbd=2616945459

ro.boottime.init=2324

ro.boottime.init.selinux=62

ro.boottime.init.cold_boot_wait=101

ro.boottime.ueventd=2471115921

ro.boottime.recovery=2615015728

ro.boottime.set_permissive=2614439074

ro.config.ringtone=omni_ringtone1.ogg,omni_ringtone1.ogg

ro.config.alarm_alert=omni_alarm1.ogg

ro.config.notification_sound=omni_notification1.ogg

dalvik.vm.isa.arm.variant=cortex-a53

dalvik.vm.isa.arm.features=default

dalvik.vm.isa.arm64.variant=cortex-a53

dalvik.vm.isa.arm64.features=default

dalvik.vm.lockprof.threshold=500

dalvik.vm.stack-trace-dir=/data/anr

dalvik.vm.image-dex2oat-filter=verify-at-runtime

debug.atrace.tags.enableflags=0

ro.art.hiddenapi.warning=1

ro.com.google.clientidbase=android-google

ro.com.android.wifi-watchlist=GoogleGuest

ro.opa.eligible_device=true

ro.url.legal=http://www.google.com/intl/%s/mobile/android/basic/phone-legal.html

ro.boot.em.did=4434cf2fa9dc

ro.boot.em.model=SM-A405FN

ro.boot.em.status=0x0

ro.boot.sn.param.offset=7342000

ro.boot.wb.hs=0e03

ro.boot.wb.snapQB=CUSTOM

ro.boot.svb.ver=SVB1.0

ro.boot.sales.param.offset=7340572

ro.boot.ulcnt=1

ro.boot.lassen.apfuse=8

ro.boot.product.model=SM-A405FN

ro.boot.sec_atd.tty=/dev/ttySAC2

ro.boot.selinux=enforcing

ro.boot.dtbo_idx=1

ro.boot.hardware=exynos7885

ro.boot.revision=4

ro.boot.ucs_mode=0

ro.boot.ap_serial=0x4434CF2FA9DC

ro.boot.carrierid=NEE

ro.boot.carrierid.param.offset=7340608

ro.boot.dram_info=FF,04,10,4G

ro.boot.prototype.param.offset=7345920

ro.boot.bootloader=A405FNXXU2ASJ3

ro.boot.avb_version=1.1

ro.boot.debug_level=0x4f4c

ro.boot.force_upload=0x0

ro.boot.warranty_bit=1

ro.boot.emmc_checksum=3

ro.boot.hmac_mismatch=0

ro.boot.odin_download=1

ro.boot.security_mode=1526595585

ro.boot.upload_offset=6880000

ro.boot.cp_reserved_mem=off

ro.boot.recovery_offset=7347968

ro.boot.verifiedbootstate=orange

ro.omni.device=a40dd

ro.omni.version=9-20191207-a40dd-HOMEMADE

ro.omni.version.security_patch=

ro.twrp.boot=1

ro.twrp.version=3.3.1-0

ro.vndk.lite=true

ro.vndk.version=28

ro.wifi.channels=

ro.allow.mock.location=1

ro.build.id=PQ3B.190801.002

ro.build.date=Sat Dec 7 00:32:51 UTC 2019

ro.build.date.utc=1575678771

ro.build.host=ubuntu

ro.build.tags=test-keys

ro.build.type=eng

ro.build.user=ponces

ro.build.flavor=omni_a40dd-eng

ro.build.display.id=omni_a40dd-eng 9 PQ3B.190801.002 eng.ponces.20191207.003253 test-keys

ro.build.product=a40dd

ro.build.selinux=1

ro.build.version.sdk=28

ro.build.version.base_os=

ro.build.version.release=9

ro.build.version.codename=REL

ro.build.version.incremental=eng.ponces.20191207.003253

ro.build.version.preview_sdk=0

ro.build.version.all_codenames=REL

ro.build.version.security_patch=2099-12-31

ro.build.version.min_supported_target_sdk=17

ro.build.ab_update=false

ro.build.description=omni_a40dd-eng 9 PQ3B.190801.002 eng.ponces.20191207.003253 test-keys

ro.build.characteristics=default

ro.build.system_root_image=true

ro.bionic.ld.warning=1

ro.kernel.android.checkjni=1

ro.secure=0

ro.treble.enabled=false

ro.product.cpu.abi=arm64-v8a

ro.product.cpu.abilist=armeabi-v7a,armeabi

ro.product.cpu.abilist32=armeabi-v7a,armeabi

ro.product.cpu.abilist64=

ro.product.name=omni_a40dd

ro.product.brand=Samsung

ro.product.model=Galaxy A40

ro.product.device=a40dd

ro.product.manufacturer=Samsung

ro.baseband=unknown

ro.bootmode=unknown

ro.hardware=exynos7885

ro.revision=4

ro.services.whitelist.packagelist=com.google.android.gms

ro.bootimage.build.date=Sat Dec 7 00:32:51 UTC 2019

ro.bootimage.build.date.utc=1575678771

ro.bootimage.build.fingerprint=Samsung/omni_a40dd/a40dd:9/PQ3B.190801.002/ponces12070032:eng/test-keys

ro.bootloader=A405FNXXU2ASJ3

ro.debuggable=1

ro.modversion=OmniROM-9-20191207-a40dd-HOMEMADE

ro.setupwizard.enterprise_mode=1

ro.property_service.version=2

ro.control_privapp_permissions=enforce

ro.actionable_compatible_property.enabled=false

init.svc.adbd=running

init.svc.ueventd=running

init.svc.recovery=running

init.svc.set_permissive=stopped

twrp.crash_counter=0

twrp.action_complete=0

sys.usb.ffs.ready=1

ro.build.fingerprint=Samsung/omni_a40dd/a40dd:9/PQ3B.190801.002/ponces12070032:eng/test-keys

ro.persistent_properties.ready=true

ro.boot.serialno=R58MA7L9B2B

ro.serialno=R58MA7L9B2B

service.adb.root=1

net.bt.name=Android

net.tethering.noprovisioning=true

sys.usb.controller=13600000.dwc3

persist.sys.usb.config=adb

persist.sys.dalvik.vm.lib.2=libart.so

persist.sys.disable_rescue=true

sys.usb.configfs=1

SELinux contexts loaded from /file_contexts

Full SELinux support is present.

tw_get_context got selinux context: u:object_r:media_rw_data_file:s0

I:Got default contexts and file mode for storage files.

I:Unable to find source file /cache/recovery/log.gz

I:Attempt to load settings from settings file...

I:InfoManager loading from '/data/media/0/TWRP/.twrps'.

I:Backup folder set to '/data/media/0/TWRP/BACKUPS/R58MA7L9B2B'

I:Mount: Unable to find partition for path '/etc'

I:Copied file /etc/recovery.fstab to /cache/recovery/recovery.fstab

I:Version number saved to '/cache/recovery/.version'

I:Unable to mount '/external_sd'

I:Actual block device: '', current file system: 'vfat'

I:Unable to mount '/usb-otg'

I:Actual block device: '', current file system: 'vfat'

__bionic_open_tzdata: couldn't find any tzdata when looking for CST6CDT,M3.2.0,M11.1.0!

__bionic_open_tzdata: couldn't find any tzdata when looking for posixrules!

I:TWFunc::Set_Brightness: Setting brightness control to 16300

I:PageManager::LoadFileToBuffer loading filename: '/twres/languages/en.xml' directly

parsing languageFile

parsing languageFile done

I:Translating partition display names

I:Backup folder set to '/data/media/0/TWRP/BACKUPS/R58MA7L9B2B'

I:Starting MTP

I:Cannot find file /sys/class/android_usb/android0/idVendor

I:Cannot find file /sys/class/android_usb/android0/idProduct

I:[MTP] Starting MTP

I:sending message to add 65537 '/data/media/0' 'Internal Storage'

I:Message sent, add storage ID: 65537 '/data/media/0'

MTP Enabled

I:[MTP] created new mtpserver object

I:[MTP] mtppipe add storage 65537 '/data/media/0'

I:Check_Lifetime_Writes result: '1947205'

I:Switching packages (TWRP)

I:Starting Adb Backup FIFO

I:Set page: 'main'

I:Set page: 'clear_vars'

I:Set page: 'main2'

I:Set page: 'backup'

I:Set overlay: 'select_storage'

I:Set overlay: ''

I:Set page: 'clear_vars'

I:Set page: 'backup'

I:Set page: 'backup_run'

I:operation_start: 'Nandroid'

Updating partition details...

I:Data backup size is 1358MB, free: 50180MB.

I:Unable to mount '/external_sd'

I:Actual block device: '', current file system: 'vfat'

I:Unable to mount '/usb-otg'

I:Actual block device: '', current file system: 'vfat'

...done

I:Backup Name is: '2020-01-22--12-34-37_treble_arm64_bvN-userdebug_10_QQ1B200105004'

I:Backup_Folder is: '/data/media/0/TWRP/BACKUPS/R58MA7L9B2B/2020-01-22--12-34-37_treble_arm64_bvN-userdebug_10_QQ1B200105004'

I:Calculating backup details...

* Total number of partitions to back up: 8

* Total size of all data: 7071MB

* Available space: 50180MB

[BACKUP STARTED]

* Backup Folder: /data/media/0/TWRP/BACKUPS/R58MA7L9B2B/2020-01-22--12-34-37_treble_arm64_bvN-userdebug_10_QQ1B200105004

Backing up Modem Firmware...

I:Reading '/dev/block/mmcblk0p19', writing '/data/media/0/TWRP/BACKUPS/R58MA7L9B2B/2020-01-22--12-34-37_treble_arm64_bvN-userdebug_10_QQ1B200105004/modem.emmc.win'

I:Restored default metadata for /data/media/0/TWRP/BACKUPS/R58MA7L9B2B/2020-01-22--12-34-37_treble_arm64_bvN-userdebug_10_QQ1B200105004/modem.emmc.win

* Generating digest...

I:SHA2 Digest: b04b23c29704ff0714b8e391adad329312e502ab9b8e94431bc3b40f1b2cf28f modem.emmc.win

I:digest_filename: /data/media/0/TWRP/BACKUPS/R58MA7L9B2B/2020-01-22--12-34-37_treble_arm64_bvN-userdebug_10_QQ1B200105004/modem.emmc.win.sha2

* Digest Created.

I:Partition Backup time: 1

Backing up Boot...

I:Reading '/dev/block/mmcblk0p15', writing '/data/media/0/TWRP/BACKUPS/R58MA7L9B2B/2020-01-22--12-34-37_treble_arm64_bvN-userdebug_10_QQ1B200105004/boot.emmc.win'

I:Restored default metadata for /data/media/0/TWRP/BACKUPS/R58MA7L9B2B/2020-01-22--12-34-37_treble_arm64_bvN-userdebug_10_QQ1B200105004/boot.emmc.win

* Generating digest...

I:SHA2 Digest: 5f6ec8c65e1814a8ed9da9139ab5672973831ca88a14220f0fefee7ff9a8d251 boot.emmc.win

I:digest_filename: /data/media/0/TWRP/BACKUPS/R58MA7L9B2B/2020-01-22--12-34-37_treble_arm64_bvN-userdebug_10_QQ1B200105004/boot.emmc.win.sha2

* Digest Created.

I:Partition Backup time: 1

Backing up Cache...

I:Creating backup...

I:Creating tar file '/data/media/0/TWRP/BACKUPS/R58MA7L9B2B/2020-01-22--12-34-37_treble_arm64_bvN-userdebug_10_QQ1B200105004/cache.ext4.win'

I:addFile '/cache/backup_stage' including root: 0

==> set selinux context: u:object_r:cache_backup_file:s0

I:addFile '/cache/magisk.log.bak' including root: 0

==> set selinux context: u:object_r:cache_file:s0

I:addFile '/cache/backup' including root: 0

==> set selinux context: u:object_r:cache_private_backup_file:s0

I:addFile '/cache/recovery' including root: 0

==> set selinux context: u:object_r:cache_recovery_file:s0

I:addFile '/cache/recovery/log.gz' including root: 0

==> set selinux context: u:object_r:cache_recovery_file:s0

I:addFile '/cache/recovery/recovery.fstab' including root: 0

==> set selinux context: u:object_r:cache_recovery_file:s0

I:addFile '/cache/recovery/storage.fstab' including root: 0

==> set selinux context: u:object_r:cache_recovery_file:s0

I:addFile '/cache/recovery/last_log.gz' including root: 0

==> set selinux context: u:object_r:cache_recovery_file:s0

I:addFile '/cache/recovery/.version' including root: 0

==> set selinux context: u:object_r:cache_recovery_file:s0

I:addFile '/cache/magisk.log' including root: 0

==> set selinux context: u:object_r:cache_file:s0

I:Closing tar

I:Thread id 0 tarList done, 0 archives.

I:Thread ID 0 finished successfully.

I:InfoManager saving '/data/media/0/TWRP/BACKUPS/R58MA7L9B2B/2020-01-22--12-34-37_treble_arm64_bvN-userdebug_10_QQ1B200105004/cache.info'

I:createTarFork() process ended with RC=0

* Generating digest...

I:SHA2 Digest: 2d2c7f0e8009eaceb73a92396dcaf7f9392c813914412ffd9c5d4c5226826189 cache.ext4.win

I:digest_filename: /data/media/0/TWRP/BACKUPS/R58MA7L9B2B/2020-01-22--12-34-37_treble_arm64_bvN-userdebug_10_QQ1B200105004/cache.ext4.win.sha2

* Digest Created.

I:Partition Backup time: 0

Backing up Data (excl. storage)...

Backups of Data do not include any files in internal storage such as pictures or downloads.

I:Creating backup...

I:Creating tar file '/data/media/0/TWRP/BACKUPS/R58MA7L9B2B/2020-01-22--12-34-37_treble_arm64_bvN-userdebug_10_QQ1B200105004/data.ext4.win'

I:addFile '/data/drm' including root: 0

==> set selinux context: u:object_r:drm_data_file:s0

I:addFile '/data/app-private' including root: 0

==> set selinux context: u:object_r:apk_private_data_file:s0

I:addFile '/data/anr' including root: 0

==> set selinux context: u:object_r:anr_data_file:s0

I:addFile '/data/system_ce' including root: 0

==> set selinux context: u:object_r:system_data_file:s0

I:addFile '/data/system_ce/0' including root: 0

==> set selinux context: u:object_r:system_data_file:s0

I:addFile '/data/system_ce/0/esCjA2d4mG3ENHKhpfhqKA' including root: 0

==> set selinux context: u:object_r:system_data_file:s0

I:addFile '/data/system_ce/0/,E4Bpv9KzA91z4eQDQMdHB' including root: 0

==> set selinux context: u:object_r:system_data_file:s0

I:addFile '/data/system_ce/0/,E4Bpv9KzA91z4eQDQMdHB/XKGHlcuZbWvm8OTLTdWdTC' including root: 0

==> set selinux context: u:object_r:system_data_file:s0

I:Error adding file '/data/system_ce/0/,E4Bpv9KzA91z4eQDQMdHB/XKGHlcuZbWvm8OTLTdWdTC' to '/data/media/0/TWRP/BACKUPS/R58MA7L9B2B/2020-01-22--12-34-37_treble_arm64_bvN-userdebug_10_QQ1B200105004/data.ext4.win'

Error creating backup.

I:ERROR tarList for thread ID 0

Error creating backup.

I:InfoManager saving '/data/media/0/TWRP/BACKUPS/R58MA7L9B2B/2020-01-22--12-34-37_treble_arm64_bvN-userdebug_10_QQ1B200105004/data.info'

createTarFork() process ended with ERROR: 255

Backup Failed. Cleaning Backup Folder.

I:Copied file /tmp/recovery.log to /data/media/0/TWRP/BACKUPS/R58MA7L9B2B/2020-01-22--12-34-37_treble_arm64_bvN-userdebug_10_QQ1B200105004/recovery.log

I:Set page: 'action_complete'

I:operation_end - status=1

I:TWFunc::Set_Brightness: Setting brightness control to 5

I:TWFunc::Set_Brightness: Setting brightness control to 0

I:TWFunc::Set_Brightness: Setting brightness control to 16300

I:Set overlay: ''

I:Set page: 'reboot_system_routine'

I:Set page: 'rebootcheck'

I:Set page: 'appcheck'

I:operation_start: 'Check for TWRP App'

I:App not installed

I:Set page: 'rebootapp'

I:operation_end - status=0

I:Set page: 'rebootapp'

I:Set page: 'main'

I:Set page: 'clear_vars'

I:Set page: 'main2'

I:Set page: 'advanced'

I:Set page: 'copylog'

I:Set page: 'action_page'

I:operation_start: 'Copy Log'

Any help is appreciated.