Try clean install and flash magisk before reboot, everything work on my side^^
Hello and thanks.
- install TWRP 3.2.1-0
- install the last version of AOSP
- install gapp for android 9.0
- install magisk 18.0
all without error message. Delete the cache and data. When i reboot the system to load i see the Google message ... it lock there and after 5 second the lcd will be turned off, i don't understand if the system is shutdown or only locked...