On booting up, system crashes with the UI and only Microsoft Teams opens up

Good morning,
So Ubuntu was working perfectly well when I installed it yesterday, also installed Microsoft teams. However, today, when I tried to start up my device, it returned me with errors and the suchlike (I should've taken a picture of the error messages but now they don't come up anymore) and tells me to sign out? And a little later, all that opens up is Microsoft teams, I don't have the ability to do anything else. The error was around the lines of gnome crashing, and I can't see the sidebars.
The sidebar and top bar are greyed and crossed out, and every time I boot up, it says that there's been an internal error and to log out.
I can't open anything else, but Teams is working perfectly - ironically. I can't even open a terminal, or startup items to get rid of Teams starting. I've also installed zsh, ohmyzsh, preload, and a few other things along with my installation of Ubuntu yesterday. Most notable is that I put some swap memory on a flash drive too.
I did restart yesterday but nothing broke then.
The device is an Acer laptop with 4gb of RAM and a 2 ghz clock speed, on a 20gb partition dual hooting with Windows 7.

I've gotten rid of Teams as an autostart, so now I'm left with the looping error 'A problem has occurred and the system can't recover' and to 'log out' which just comes back to this screen.