[Huawei Mediapad M3 ROMs, Kernels, Recoveries, & Ot] friedsonjm:
Sadly... I just did all that, and still have exactly the same results. I thank you for your help, not sure what else can be done.... I've installed ROMs before, although not for a long time, have not run into this problem before. Let me know if you have any other ideas... jf

FRom REcovery LOG

I:operation_start: 'Flash Image'

[IMAGE FLASH STARTED]

Image to flash: '/external_sd/TWRP/boot_btv-w09_2020-04-29.img'

Calculating restore details...

I:Image filename is: boot_btv-w09_2020-04-29.img

I:Reading '/external_sd/TWRP/boot_btv-w09_2020-04-29.img', writing '/dev/block/mmcblk0p28'

[IMAGE FLASH COMPLETED]

I:Set page: 'action_complete'

I:operation_end - status=0

I:Set page: 'clear_vars'

I:Set page: 'flashimage_confirm'

I:Set page: 'clear_vars'

I:Set page: 'install'

I:Set page: 'install'

I:Set page: 'flash_confirm'

I:Set page: 'flash_zip'

I:operation_start: 'Flashing'

Installing zip file '/external_sd/TWRP/open_gapps-arm64-8.1-pico-20200509.zip'

Checking for Digest file...

I:Update binary zip

Verifying package compatibility...

Package doesn't contain compatibility.zip entry

I:Extracting updater binary 'META-INF/com/google/android/update-binary'

I:Zip does not contain SELinux file_contexts file in its root.

I:Legacy property environment not used in updater.

Archive: /external_sd/TWRP/open_gapps-arm64-8.1-pico-20200509.zip

inflating: /tmp/app_densities.txt

Archive: /external_sd/TWRP/open_gapps-arm64-8.1-pico-20200509.zip

inflating: /tmp/app_sizes.txt

Archive: /external_sd/TWRP/open_gapps-arm64-8.1-pico-20200509.zip

inflating: /tmp/bkup_tail.sh

Archive: /external_sd/TWRP/open_gapps-arm64-8.1-pico-20200509.zip

inflating: /tmp/gapps-remove.txt

Archive: /external_sd/TWRP/open_gapps-arm64-8.1-pico-20200509.zip

inflating: /tmp/g.prop

Archive: /external_sd/TWRP/open_gapps-arm64-8.1-pico-20200509.zip

inflating: /tmp/installer.sh

Archive: /external_sd/TWRP/open_gapps-arm64-8.1-pico-20200509.zip

inflating: /tmp/busybox-arm

Archive: /external_sd/TWRP/open_gapps-arm64-8.1-pico-20200509.zip

inflating: /tmp/tar-arm

Archive: /external_sd/TWRP/open_gapps-arm64-8.1-pico-20200509.zip

inflating: /tmp/unzip-arm

Archive: /external_sd/TWRP/open_gapps-arm64-8.1-pico-20200509.zip

inflating: /tmp/zip-arm

##############################

_____ _____ ___ ____

/ _ \ | __ \ / _ \ | _ \

| / \ || |__) | |_| || | \ \

| | | || ___/| __/ | | | |

| \ / || | \ |__ | | | |

\_/ \_/ |_| \___| |_| |_|

___ _ ___ ___ ___

/ __| /_\ | _ \ _ \/ __|

| (_ |/ _ \| _/ _/\__ \

\___/_/ \_\_| |_| |___/

##############################

Open GApps pico 8.1 - 20200509

- Mounting partitions

- Gathering device & ROM information

*** Incompatible Android ROM detected ***

This GApps pkg is for Android 8.1.x ONLY

Please download the correct version for

your ROM: 9 (SDK 28)

******* GApps Installation failed *******

- Copying Log to /external_sd/TWRP

- NO changes were made to your device

Installer will now exit...

Error Code: 20

cp: can't stat '': No such file or directory

cp: can't stat '/system/etc/g.prop': No such file or directory

cp: can't stat '/system/default.prop': No such file or directory

cp: can't stat '/system/build.prop': No such file or directory

cp: can't stat '/system/product/build.prop': No such file or directory

cp: can't stat '/vendor/build.prop': No such file or directory

cp: can't stat '/product/build.prop': No such file or directory

cp: can't stat '/system_root/default.prop': No such file or directory

cp: can't stat '/system_root/build.prop': No such file or directory

cp: can't stat '/system_root/product/build.prop': No such file or directory

cp: can't stat '/data/local.prop': No such file or directory

cp: can't stat '/build.prop': No such file or directory

cp: can't stat '/system/addon.d/70-gapps.sh': No such file or directory

cp: can't stat '/cache/recovery/log': No such file or directory

/tmp/installer.sh: line 1272: logcat: not found

- Unmounting partitions

Updater process ended with ERROR: 20

I:Install took 10 second(s).

Error installing zip file '/external_sd/TWRP/open_gapps-arm64-8.1-pico-20200509.zip'

Updating partition details...

I:Can't probe device /dev/block/mmcblk0p35

Failed to mount '/3rdmodem' (Invalid argument)

I:Actual block device: '/dev/block/mmcblk0p35', current file system: 'ext4'

I:Data backup size is 0MB, free: 25037MB.

I:Unable to mount '/usbotg'

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

...done

I:Set page: 'flash_done'

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 9960

I:Set overlay: ''

I:Set page: 'clear_vars'

I:Set page: 'install'

I:Set page: 'install'

I:Set page: 'flashimage_confirm'

I:Set page: 'action_page'

I:operation_start: 'Flash Image'

[IMAGE FLASH STARTED]

Image to flash: '/external_sd/TWRP/boot_btv-w09_2020-04-29.img'

Calculating restore details...

I:Image filename is: boot_btv-w09_2020-04-29.img

I:Reading '/external_sd/TWRP/boot_btv-w09_2020-04-29.img', writing '/dev/block/mmcblk0p28'

[IMAGE FLASH COMPLETED]

I:Set page: 'action_complete'

I:operation_end - status=0

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 9960

I:Set overlay: ''

I:Set page: 'reboot_system_routine'

I:Set page: 'rebootcheck'

I:Set page: 'confirm_action'

I:Set page: 'clear_vars'

I:Set page: '