Unity Hub won't let me load my projects?

I'm on Unity Hub 3.0.1 and it wont let me load any new projects I make. When I try to make a new one it makes the project but when ever I actually try to go into my project it just says this.

I tried deleting Unity and re-downloading but it still showed it. I tired restarting Windows 10 but it still didn't work. Also I am new to having a windows 10 so if you know how to fix this please explain to me carefully because I don't know all the technical stuff of windows 10.