yashsingh1/xdaforums huggingface dataset:
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] bud7dha:
[MENTION=5893314]shadowstep[/MENTION] Is it possible to upgrade from 5.1.7 OOS (Oreo) directly to 9.0.8 OOS (Pie) using twrp-3.2.3-0-20181227-codeworkx-nocompatcheck-dumpling.img? TIA
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] shadowstep:
Yep, it should work. Give it a shot. More detailed instructions are present in the first post of this thread. :)
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] shadowstep:
Heads up for those who haven't noticed yet - there's been an update. The latest version of TWRP by codeworkx is now twrp-3.3.1-20190908-0-codeworkx-signed-forcedecrypt-dumpling.img.
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] Critique:
why "forcedecrypt"?
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] shadowstep:
Here you go:
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] osm0sis:
Feels a little pointless when your bootloader has to be unlocked to flash TWRP, and `fastboot format userdata` is a thing.
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] codeworkx:
You should be able to relock bootloader after twrp got flashed.
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] osm0sis:
No AVB verity problems with that?
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] codeworkx:
Afaik its possible to use custom keys since 5.1.5.

Latest twrp version is signed with custom keys.
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] trancinguy:
You mean Chainfire's Zip for the keys, bootsignature.jar?
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] jgcaap:
after flashing this recovery and flashing one of the custom roms, when I try to roll back to the OOS it doesn't decrypt and I can't access the rom. Did anyone had the same issue? Many thanks
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] Zraxonix:
When going back to stock, you backup what you need, then format everything, flash stock and after that you would need to update stock first before flashing latest twrp recovery.
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] sleepwalking0593:
Better remove lockscreen pin on older rom when jumping from one rom to another.

Or Do this

Boot into TWRP

Use the TWRP File Manager and Navigate to /data/sytem/ and delete the following files:

locksettings.db

locksettings.db-shm

locksettings.db-wal.

gatekeeper.password.key

gatekeeper.pattern.key
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] jgcaap:
I had to format my whole phone..lol
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] sleepwalking0593:
I stay decrypted nowadays. It's easy to jump between ROMs and also now android q going to come out. If I want to flash q rom and then come back to oos p. I need to format again but if I'm decrypted I can just do a normal clean flash.
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] jgcaap:
To be decrypted you need to remove the pin key only right?
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] PomstaZLesa:
no, you have to do a factory reset afaik
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] sleepwalking0593:
You have to wipe internal storage.

In fastboot mode

Fastboot format userdata

Now transfer all files back into phone and flash no Verity zip to prevent phone from getting encrypted. Whenever you flash ROM clean or dirty. You need to flash no Verity zip
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] jgcaap:
Is there a way to keep encrypted?
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] shadowstep:
By default, you stay encrypted only. So basically a clean flash would give you encryption, unless you format userdata and flash the no-verity zip (which disables forced encryption) before booting into the ROM.
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] freyrnygaard:
Would that mean that I can relock bootloader and keep as stock as possible, without breaking any flags? And be able to flash for ex: dotfix for dumpling?

Edit: I tried to lock the bootloader after flashing the latest image but device won't boot. Your device can't be trusted error message appears until I unlock it. :/
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] Seferi:
Hi, I'm getting error 255 when I try to backup. Can anyone help? Thanks.
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] trancinguy:
I don't think you can make full Nandroid, only some of the partitions.
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] nixie2121:
so i just flashed the latest on my 5T and when I try to boot it just is a black screen with the led on, any ideas?
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] Prometheus:
How did you flash it? I flashed using Fastboot and works great
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] codeworkx:
Why don't you read the post carefully?

Android 9.x ([B][COLOR="Red"]requires Pie firmware[/COLOR][/B])
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] nixie2121:
Sorry about that, you are correct. I was in a panic when I posted. I needed to take a second and relax. Thanks for the reply!
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] cmonty14:
Hi,

after flashing latest OnePlus 5T software upgrade

OnePlus5TOxygen_43_OTA_052_all_1910081959_d9b7d35ef2554e65.zip

I have installed this recovery twrp-3.3.1-1-20190713-codeworkx-dumpling.img in bootloader mode.

There was no error during installation, however when I try to reboot the device it automatically shuts down when booting was completed and starts loading recovery.

If I flash the OnePlus software upgrade only there are no issues booting the device.

However I need TWRP recovery.

How can I fix this issue?

THX
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] PomstaZLesa:
use twrp-3.3.1-20190908-0-codeworkx-signed-forcedecrypt-dumpling.img
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] cmonty14:
Thanks.

Can you please clarify the differences between twrp-3.3.1-20190908-0-codeworkx-signed-forcedecrypt-dumpling.img and twrp-3.3.1-1-20190713-codeworkx-dumpling.img?

The naming implies something related to decrypt, but I face no decryption issue with twrp-3.3.1-1-20190713-codeworkx-dumpling.img.
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] xXNilsXx:
You can get into 0713 without entering your password, in 0908 you have to enter it
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] Redn2000:
Hello,

After flashing the newest update 43_OTA_052_all_1910081959_2a736c0b067a52, I've also been getting an issue where the system will immediately start the shutdown process after getting to android. I usually have Magisk and Swift Installer installed, and used Oxygen Updater for the update process. I even made sure to disable swift installer and reboot before trying the update. I saw other users here update TWRP to see if this fixed it, but I haven't had any luck after doing so. Is there something else I can do here?
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] nguyenlucky:
Remove (NOT disable) OOS call recording module before installing system update.

But now you have updated with that module installed, flash Magisk uninstaller then reinstall Magisk
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] Redn2000:
Ah, I hadn't realized it was the call recorder doing this, thank you. And I was able to solve it by just flashing the image directly from OnePlus' site, then reflashed TWRP after. It's a roundabout way, but thankfully I know which modules cause issues now. And on an unrelated note, how long has TWRP had theming options? I only noticed it after installing the new image.
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] fpoliveira:
TWRP not last clean version of the system Minimal ADB and Fastboot

Hi friend would like to know the following how can I make him clean the system because here it does not clear it only cleans cache, dalvik and date how to solve this problem with the last atualisação until the official happens it can not clean the system do use TWRP not last clean version of the system Minimal ADB and Fastboot please the windows CMD grateful
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] Redn2000:
Are you trying to completely format your system partition? And are you trying to flash just TWRP or the newest official OxygenOS release?
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] fpoliveira:
answer

friend I am trying to clean up the system is to put another rom
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] Devione:
Hey guys, I'm running the latest LineageOS 16.0 (20191103), and everything is working fine except when I put in a PIN and TWRP doesn't recognise it; logging into Android itself is no issue, just TWRP. This is solved by using Codeworkx's forcedecrypt .img. It turns out I can't just use any random TWRP.

What's the issue here exactly?

Thanks guys for your time.
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] freegame619:
It does not work, when I click on mout USB Storage, it not getting selected.
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] the Doctor:
There is a thread here for that:

OnePlus 5T: Unlock Bootloader | Flash TWRP |

Root

| Nandroid & EFS Backup & More !!

Otherwise, questions should be posted in the Help/Q&A section, not a recovery thread.
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] ysco:
You need to plugin your USB device first then you can enable the USB setting.

Look at the attached image that it works for me.

Regards ysco..
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] cubandanger05:
I'm on OB1 and the otg does not work for me either on the universal build. I can see it but it won't mount, so I went back to my previous recovery.
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] ysco:
Hmm strange that for some it don't work.

I whas on blu spark recovery and flashed universal twrp and working without a issue. I'm on liqued rom decrypted maybe it is working for me because I'm on decrypted?

Maybe the dev can give a answer on this issue.

Regards. ysco..
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] codeworkx:
Rom doesn't matter. Encryption state shouldn't matter, too.

But filesystem of the usb drive does. Must be fat afaik.
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] ysco:
Hello dev.

Indeed I'm using fat as format ;)

Thanks for the great work.

Regards ysco..
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] pieriv59:
Does it work with Nougat Roms ?

---------- Post added at 06:54 PM ---------- Previous post was at 06:47 PM ----------

Can i flash LOS 15.1 with this TWRP from OOS 4.7.6 and restore data ?
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] :
So i should be able to flash any rom (including OOS) without wiping internal (Format Data) as long as i clean flash (Wipe System>Data>Caches) and as long as i remove any password or pin?
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] skyeking69:
just curious..how did you get the custom colour on the codeworkx twrp?
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] ysco:
Hello mate,

Have a look at this thread https://xdaforums.com/android/themes/theme-twrp-materialised-dark-light-play-t2915584

There you can download versions that works with twrp 3.2.1.0

Best regards,

ysco..
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] skyeking69:
Cheers!
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] Fignoleur:
Flashed via blue spark...all good.

Thanks

Edit: encrypted, Omni 8.1, magisk 15.2
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] codeworkx:
From N to O? Will explode.
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] azsl1326:
Attempting to restore and getting an error: extractTarFork() process ended with error 255. Any ideas?

Thanks!
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] musicman5844:
Ok here we go brand new op5t on latest stock 7.1.1. I've already factory updated to latest version now I've unlocked bootloader which twrp.img should I fastboot to my device (( note I never use pin are password screen lock )) and I only plan on using 8.1 custom roms only
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] ps000000:
Work well with many 8.1 custom ROMs.

:fingers-crossed::fingers-crossed::fingers-crossed:
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] bdwilk:
Use the universal version.
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] musicman5844:
Sure thing thanks bro I'm on it
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] Lasersdude:
I come from an oos based nougat custom rom with blu spark twrp. I flashed the official oos OB1 and booted into it. Now i want to go back to my old nougat setup by clean flashing it. Can i do this with the blu spark twrp or do i need to install one of this twrps here to wipe partitions and install the N rom?
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] BBuZZ:
It's not an issue... That pin doesn't exist... Your phone is encrypted...

To enter twrp, try removing all pins (except sim) and lockscreens, reboot, and then you'll enter twrp straight in..
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] Devione:
You're right. However I wasn't being clear sorry.

Everything works as it should when there is no password / PIN / fingerprint etc setup. The device is encrypted straight after flashing yes nothing wrong there, going into TWRP is no issue at all.

What I'm curious is that after setting up my device and having it locked with a PIN, the PIN works for getting into the OS no problems or issues but when the exact same PIN is used to enter TWRP it won't work and it will say "Wrong Password". Rebooting into OS and logging in to the device won't have any issues.

This issue is solved by using Codeworkx's "forcedecrypt" TWRP, and not just any random Dumpling recovery.

So there really isn't any issue, I'm just trying to understand what makes Codeworkx's TWRP different and what I'm doing wrong?

Thanks for your time.
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] DoR3M3:
I'm using a OnePlus 5T running LineageOS microG you can see the ROMS here;

https://download.lineage.microg.org/dumpling/

With the latest version, "lineage-16.0-20190924-microG-dumpling", when I try to flash the ROM I am getting this error message in "twrp-3.3.1-1-20190713-codeworkx-dumpling"; updater process ended with error: 7

When I first started using LineageOS microG, I was then using the official version of TWRP and I was also not able to flash it to the device, because I read online I needed an updated version of TWRP, so then I started using your version that I listed and it worked just fine, but now with this latest version of LineageOS microG it will no longer flash to the device, and I'm thinking because TWRP needs updating?

Hmm

P.S. My mistake I forgot to get the latest firmware 9.0.9 from OnePlus, it's all good now...
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] micro2112:
I've been out of the game a while. and have the same ERROR 7. Where can i get that firmware you mentioned?
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] shadowstep:
https://xdaforums.com/showpost.php?p=80559327&postcount=175
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] Stone. Cold:
Please help

Hello everyone, just wondering does this TWRP work with OTG USB? I have ordered one, because my device is stuck in recovery, I can't mount or use adb/fastboot either (tried both, before was working perfectly fine). I just want to know if anyone has tried OTG USB with this twrp and if it works or not. Just curious, thank you.
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] skidaway:
Everything functions as it's supposed to. I've used USB-OTG multiple times to install zip and img files, as well as make and restore backups.
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] Stone. Cold:
Thank you for the reply, I was just wondering because my phone wasn't connecting to my pc (file transfer), which it usually does with this TWRP, but now it doesn't because it's soft bricked. Anyway thank you, can't wait to test the OTG cable when it arrives :)

I will let you know how it goes, delivery expecting around Tue/Wed.
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] Stone. Cold:
Okay.. I have received the OTG cable today and it isn't working on my device. I have tested it on my brother's LG G6 and it works perfectly on his device's TWRP, but on mine it doesn't for some reason.. There was a blue LED light which showed up after I tried rebooting to recovery again, which is a good sign? My TWRP version is 3.3.1-20190908-0-codeworkx. Also, my USB is FAT32 (I have also tried exFAT).

Also whenever I try to mount 'USB Storage" it simply does not tick the box at all, I have been trying to mount it, but it seems impossible :(

Please can someone help me solve this issue as soon as possible, I would appreciate it very much :)
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] trancinguy:
Blue LED usually means you have incompatible TWRP Recovery.
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] Stone. Cold:
Oh, I had no idea.. I can't really flash another recovery over this one, considering adb or fastboot do not work at all :(

I am still able to get access to TWRP codeworks recovery, but that's all my device can do ATM. Also USB OTG doesn't seem to be working either..

Edit: forgot to mention, I have no root either.. I think this is why my device is acting up.. I have even tried formatting data, wiping, etc..

Edit2: Honestly, I think my dumpling is screwed. I even tried the 5t unbrick tool and my device refuses to be shown in device manager, even after holding VOL+ and inputting the cable in, doesn't show anything.. Still waiting for my EDL Flash cable to arrive >.>
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] trancinguy:
I think your situation is complicated because you weren't on 909 firmware, then installed stuff intended for 909 firmware, hence the incompatibility.

TWRP a lot of times doesn't respond well to OTG, so you have to reboot to recovery from the recovery, them attempt again, select storage and change between otg and internal until it recognizes your external storage.

What was your firmware and TWRP before this whole thing started?
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] Stone. Cold:
Basically this all happened when I was trying to install Havoc OS 3.0, it doesn't state the firmware requirement, but I believe you're right about the firmware.. I never really had this issue with AOSIP though, I was able to flash it with the 9.0.8 firmware, so I assumed Havoc would also work with 9.0.8. As for the TWRP, I have previously used the official TWRP 3.3.1.0, before switching to codeworks 3.3.1.0 (to install android q based roms)

I will try the recovery again
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] nba-guy:
Error 7 when flashing to Pie

Wondering if I could get some help on this issue.

I was trying to flash the latest OOS for my 5t, which has been on the 5.1.7 oreo build for over a year.

I updated my TWRP to the latest 3.2.3 file for Oreo, which is linked in the original post, however when I tried to flash the latest OOS zip I got an error 7.

It states that I am using a "OnePlus 5" when I am clearly using a 5t and flash the dumpling twrp linked in this thread.

Now my phone is stuck in recovery and I have no way of figuring this one out. I can't re-install the 5.1.7 zip I had on my phone either, getting another error with that.

**Note** I did remove the compatibility.zip from the latest OOS 9 zip, as instructed from numerous threads on how to update to Pie.
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] AtoZ0to9:
PIE is the latest OOS, and be sure you are flashing the required firmware first.
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] fpoliveira:
Problema twrp em formatar system não formata o que fazer

amigos estou tentando formatar o meu system, e não consigo como realizar o procedimento sendo, que estou fazendo pelo comando do nimmal fastboot por favor, gostaria de saber, olhem o erro quando digito twrp wipe system usando o Minimal ADB and Fastboot

já tinha pedido esta ajuda aqui mas não sei o que ouve. Por favor grato pela ajuda, não sei o que acontece. Isso acontece até mesmo com a versão oficial do twrp 3.3.1.0 por favor grato não sei digitar em inglês desenvolvedor por favor, sou deficiente visual e faço uso de custom rom por favor, grato pela ajuda.
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] crakerjac:
English Por favor.
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] cmonty14:
Nandroid Backup - Process createTarFork() ended with failure: 255

Hi,

I'm running in this failure when creating a nandroid backup with twrp-3.3.1-1-20190908-0-codeworkx-signed-forcedecrypt-dumpling.img or twrp-3.3.1-1-20190713-codeworkx-dumpling.img:

Process createTarFork() ended with failure: 255

This error occurs when creating a backup of /data/media.

Please check attached screenshot for details.

I assume this error is related to size of partition /data/media because I created nandroid backups successfully in the past (before upgrading to OxygenOS 9.0.9).

Please advise how to fix this error.

THX
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] dinindourden:
This fixed it for me:

rm -rf /data/per_boot

Found it here:

https://xdaforums.com/k20-pro/development/recovery-unofficial-twrp-xiaomi-redmi-t3944363/page70/amp/
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] droidsometimes:
I had that with other devices, but never on dumpling.

Never solved it, but I suspected it was because of high file count on /data (e.g. browser caches).

If you backup data on its own, without other partitions, does it fail as well?

And, maybe deleting some stuff (browser caches) helps?

Also, check the TWRP log (was it in /tmp?), maybe it has more info.
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] cmonty14:
This solution is NOT applicable to OnePlus 5T because directory /data/per_boot does not exist.
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] BlazeGarden:
It is applicable for the 5T. I was having the same issue. I just tested it and even renaming the directory which was empty enabled the possibility to create nandroid backups again for data. For some reason something created that directory. I think it had something to do with LOS17.1 installation. Because before if was running 17.0 without the issue.

After creating a backup and reboot the directory was created again. So pretty sure it has either something to do with LOS17.1 or perhaps Magisk-v20.3(20300)

.

---------- Post added at 11:53 PM ---------- Previous post was at 11:50 PM ----------

Thanks, this resolved it for my Oneplus 5T issue started after installation of LOS17.1 I think. Because before backups were running just fine.
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] dinindourden:
Cr Droid 6.2
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] NUGZZ420:
This just fixed my 255 error taking a back up on the Oneplus 5t running the newest recovery and the 1/19/20 crDroid 6.2 build.

This fixed it for me:

rm -rf /data/per_boot
[OnePlus 5T  ROMs, Kernels, Recoveries, & Other Dev] cmonty14:
In (original) Firmware OxygenOS 9.0.x directory /data/per_boot does not exist and therefore the solution is not applicable.

For further investigation I have uploaded

- recovery.log

- dmesg.log

This is the relevant error in recovery.log:

[...]
I:addFile '/data/user' including root: 1
==> set selinux context: u:object_r:system_data_file:s0
I:addFile '/data/user/0' including root: 1
==> set selinux context: u:object_r:system_data_file:s0
I:addFile '/data/user/10' including root: 1
==> set selinux context: u:object_r:system_data_file:s0
failed to lookup tar policy for '/data/user/10' - '014c5a611de239e6'
I:Error adding file '/data/user/10' to '/data/media/0/TWRP/BACKUPS/b94a5888/2020-01-25--15-53-15/data.ext4.win003'
Fehler beim Erstellen der Sicherung.
I:ERROR tarList for thread ID 0
Fehler beim Erstellen der Sicherung.
I:InfoManager saving '/data/media/0/TWRP/BACKUPS/b94a5888/2020-01-25--15-53-15/data.info'
Prozess createTarFork() endete mit FEHLER: 255
Sicherung fehlgeschlagen, bereinige Sicherungs-Verzeichnis

In my opinion this is a very severe issue because one of the main features of TWRP, Nandroid Backup, is failing.

Therefore I would raise it to high attention.