Xubuntu crashed, how to fix it?

Question

ubuntu

Black screen after xubuntu splash screen. consoles via ctrl + alt + f1/f2/f3/f4.. are not included.
What happened before. I installed some kind of pdf reader. I watched twitch and suddenly stopped playing the video wrote "cannot be played in your browser error 4000"
I exited chrome and started running it again, but it does not start. And not only him, nothing starts. The shutdown / restart buttons did not work, I do not remember exactly whether the terminal worked, it seems not. Therefore, I decided to turn it off using the power button. After that, the system did not start. Booted from a flash drive without installation, went to /media/xubuntu/0e510604-7e2f-2344-111-08b6f0e1a6f6/media
/
Is it really empty or because I changed my rights?
If there is no home directory, then there is no point in trying to restore it.
What could happen to the system? From the very beginning of its installation, an error window flew out (it was not said which one) and offered to send a report (sent)