Login issue on zoriin os 15.3 lite 32 bit

need help (emergency). I installed Zorin OS 15.3 lite 32 bit 2 days ago. it was working so impressively. but today it said to restart my laptop because of the latest update that just got installed. after restarting it booted the frame and then Zorin logo and then A BLACK SCREEN with some text.
The texts are:
Zorin OS 15.3 TOSHIBA-NB520-A143 tty1
TOSHIBA-NB520-A143 login:

Please help. I have no idea what to do?

Maybe this thread can help you.

Or:

EDIT:
Also this:

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