On stock rom, twrp-3.6.2_9-0-santoni and rooted with Magisk 25.2. Phone works fine. No encryption and no fingerprint configured (just pin). I specifically checked in settings and "encrypt phone" is not activated (and it never was).
Wiped absolutely everything from TWRP before flashing and I still get the "Encryption unsuccessful" message. "Encryption was interrupted and can't complete..." WTF? What encryption?
The only option is erase all data and this takes ages (after 5 minutes still not done).
Edit: 15 minutes and still not finished...
Edit 2: ok so after about 20 minutes it went briefly in TWRP then rebooted again... only to show the same error screen. Again, the only option is "Erase all data". Gonna do it one more time, then try a different rom.
Edit 3: I am very enthusiastic so I am going to post this here: I did try a different rom, because the second "erase all data" took me again to the same error. And this rom blew my mind... Admitedly, regarding crDroid, I might have messed somehing on my side - thus, the proverbial error "between the touch-screen and the chair"
. I might have not wiped/flashed (?) completely the card before installing, I only wiped Dalvik, casche etc the usual - not sure if that was the problem. But maybe the developers should give some more clear hints about what is needed.
However, for those looking for a good rom, I can suggest Havoc-OS-v4.16-20220423-santoni-Official-GApps.zip with twrp-3.6.2_9-0-santoni.img amd Magisk-v25.2 (magisk is downloaded as apk but for flashing rename to zip, works as both apk and flash image). This is an Android 11 rom but installed flawlessly, fast, with no problems and apparently everyhing works.