FP4 and (unofficial) LineageOS

Nice, thank you, this is to my mind the most interesting setup (LOS+microG).

I tried to install your build using TWRP from here
Link: TWRP for Fairphone 4

However when I try to flash it from TWRP, but ran into ERROR 1.
Procedure:

  • check md5 of build
  • Boot into TWRP (note: as it is experimental, I only booting into TWRP from with “fastboot boot” command from bootloader, not having TWRP as recovery installed)
  • Wipe/Factory reset
  • could not mount /data so formated it (solved the error)
  • try to install LOS-build
    Output see below:
Installing zip file 'path/to/file/lineage-18.1-20220206-UNOFFICIAL-FP4.zip'
Flashing A/B zip to inactive slot: A
Updater process ended with ERROR: 1
To flash additional zips, please reboot recovery to swith updater slot.
Error installing zip file 'path/to/file/lineage-18.1-20220206-UNOFFICIAL-FP4.zip'
Updating partition details...
...done

→ is the thing large enough to open a new Topic?

Unfortunately I could not figure out what ERROR 1 tries to tell me.
Anybody with same experience? Do you have an idea?

Note: Tried adb sideload first but had no luck (same ERROR 1) → tried TWRP flash/install
Note: it is my third phone flashing LOS, so I hope not to be too fresh; Cannot compile my own build do to lack of HW.

Best
Pete