[OnePlus 5T  Guides, News, & Discussion] Adam3Sixty:
Can anyone help, please?

Having a weird issue that has only just popped up.

I haven't done any updates to my device, I am on the last Oreo build of OOS. Took a back up a month or so ago and it worked fine, went to do a fresh back up last weekend and got this happening in my log file.

Total number of partitions to back up: 13

* Total size of all data: 9466MB

* Available space: 33698MB

[BACKUP STARTED]

* Backup Folder: /data/media/0/TWRP/BACKUPS/9ae5f6d9/2019-03-02--07-43-22

Backing up Boot...

I:Reading '/dev/block/sde19', writing '/data/media/0/TWRP/BACKUPS/9ae5f6d9/2019-03-02--07-43-22/boot.emmc.win'

I:Restored default metadata for /data/media/0/TWRP/BACKUPS/9ae5f6d9/2019-03-02--07-43-22/boot.emmc.win

* Generating digest...

I:SHA2 Digest: 3e9e124be83b62135622f6d4e454abf0f4b42468d838f8a3bb8bec035a09f111 boot.emmc.win

I:digest_filename: /data/media/0/TWRP/BACKUPS/9ae5f6d9/2019-03-02--07-43-22/boot.emmc.win.sha2

* Digest Created.

I:Partition Backup time: 1

Invalid encryption mode 'ice:aes-256-cts'

Backing up Cache...

Invalid encryption mode 'ice:aes-256-cts'

I:Creating backup...

I:Creating tar file '/data/media/0/TWRP/BACKUPS/9ae5f6d9/2019-03-02--07-43-22/cache.ext4.win'

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

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

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

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

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

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

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

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

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

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

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

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

I:addFile '/cache/boot_log/radio_boot.log.pre' including root: 0

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

I:addFile '/cache/boot_log/kernel_boot.log' including root: 0

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

I:addFile '/cache/boot_log/event_boot.log' including root: 0

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

I:addFile '/cache/boot_log/android_boot.log.pre' including root: 0

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

I:addFile '/cache/boot_log/event_boot.log.pre' including root: 0

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

I:addFile '/cache/boot_log/kernel_boot.log.pre' including root: 0

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

I:addFile '/cache/boot_log/radio_boot.log' including root: 0

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

I:addFile '/cache/boot_log/android_boot.log' including root: 0

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

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

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

I:addFile '/cache/nativeproc/proclist' including root: 0

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

I:addFile '/cache/magisk.log.bak' 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/9ae5f6d9/2019-03-02--07-43-22/cache.info'

I:createTarFork() process ended with RC=0

* Generating digest...

I:SHA2 Digest: 52ad993fe93bd820cad89b9c57b21e589b1336ba3cca18a57f741c880123bd45 cache.ext4.win

I:digest_filename: /data/media/0/TWRP/BACKUPS/9ae5f6d9/2019-03-02--07-43-22/cache.ext4.win.sha2

* Digest Created.

I:Partition Backup time: 0

Backing up Recovery...

I:Reading '/dev/block/sde22', writing '/data/media/0/TWRP/BACKUPS/9ae5f6d9/2019-03-02--07-43-22/recovery.emmc.win'

I:Restored default metadata for /data/media/0/TWRP/BACKUPS/9ae5f6d9/2019-03-02--07-43-22/recovery.emmc.win

* Generating digest...

I:SHA2 Digest: e5b2c02f308c7ae869b30ce237be82b7975e113faef43a0829d8899540e33ae6 recovery.emmc.win

I:digest_filename: /data/media/0/TWRP/BACKUPS/9ae5f6d9/2019-03-02--07-43-22/recovery.emmc.win.sha2

* Digest Created.

I:Partition Backup time: 1

Invalid encryption mode 'ice:aes-256-cts'

Backing up System...

Invalid encryption mode 'ice:aes-256-cts'

Error opening: '/system/app/Account' (Not a directory)

I:Error in Generate_TarList!

Error creating backup.

I:InfoManager saving '/data/media/0/TWRP/BACKUPS/9ae5f6d9/2019-03-02--07-43-22/system.info'

createTarFork() process ended with ERROR: 255

Backup Failed. Cleaning Backup Folder.

I:Copying file /tmp/recovery.log to /data/media/0/TWRP/BACKUPS/9ae5f6d9/2019-03-02--07-43-22/recovery.log

Anyone got any ideas??

I have tried official TWRP, Blu_Spark and CodeWorx versions, all give the same.error at the end.

This is worrying me as I don't like NOT having an up to date back up file. Thank in advance.

I have asked in TWRP threads and got no replies.