Make FULL backup! With ALL phone data, all information - with ONE action.
You backup also includes encrypted /data/. without re-encryption.
You can ignore any faulty TWRP including if TWRP builded even not for your phone.
No error will be reported.
What is EXCLUDED from a TWRP backup
Mostly TWRP comes from the other phone.
Also it can be build for your pone but builder not so good to build right partition list in TWRP.
So, TWRP with it BACKUP and MOUNT and WIPE sections in most cases will miss some partitions.
See below our method to fight it even with faulty TWRPs.
About our method
The main goal of our method is to backup whole internal sdcard/flash memory/Nand memory.
This is complete backup. with all of data, with encrypted/data/ partition and all the rest,
and we should not consider wrong fstab partition definitions in TWRP.
This is exact copy, precise and full.
And this is how:
What should I back up in TWRP
With our method you haven't to decide it. our method backups all.
This is How to Make Complete / Full BACKUP with TWRP