Screen freeze, What are these errors?

I was using discord and minimized it to go to desktop to reconnect my bluetooth headset from the top right menu and suddenly My screen suddenly frozen , so I make the laptop sleep and wake it up again but there was no gnome login screen , only black screen with terminal, like there is no desktop environment installed, so I entered my username and then password to login , and using

journalctl -p err -b

I see these