Keybinds not working?

[mikinis111]

I'm sorry if my question is stupid, I'm a complete beginner in linux, but what could be the reason of shortcuts not working? I can use super + enter but basically only this. I can't open an application launcher, neither close an app. Maybe I don't have necessary packages? I'm using linux mint 21. The problem appeared right after I finished installation of the Regolith.