Here Newbie---Amateur in Linus...Problem: Debian LXDE cannot boot

[Schwibinger Michael]

Good morning

What did we do:
Update Debian 9 to 10,
boot: Crash.

What did we do wrong.
Where does Linux create a logfile to send it to You find the bug.

What we can do:
We do boot with the recovery mode.

Regards
Sophie