I install magisk, on startup, the encryption message definitely deseaper. But, when a use magiskHide (I play pokemon go), the device reboot immedialty.
After this, magisk manager invites me to download the .zip because magisk is not installed, I check the root status with root checker and i'm able to give authorization.
So, I tried to uninstall magisk with TWRP and magisk-uninstaller but this is impossible because the terminal tell me magisk is not installed.
I have root access but no app to manage this
I investigate on Application list and, I noticed that there were two applications "magisk manager" called respectively "magisk manager" and "magisk".
I uninstall the first and reboot, nothing changes, when I try to uninstall the other, the device reboot.
Currently, I returned to my backup while waiting for a solution.
Edit: oh! okay i change the version for magisk 18