When doing an OTA update from 19.11.2 to 21.05.0 everything seems to work fine first:
download, reboot, update animation.
But then the lying robot appears and a message “fehler” (error).
After about 30s the device reboots and 19.11.2 is booted again.
The recovery log when “fehler” message appears is as follows:
I assume a manual installation of 21.05.0 would solve the problem but I have only been asked about a solution and I don’t have the device with me.
So may there be any other solution?
The owner of the device told me that she never did any fancy things with the device like rooting, installing different recovery or anything else.
Just a factory reset was done some time ago. This might have leaded to the message “Device was remounted R/W 4 times”?
Thanks for any ideas in addition to a manual installation.