Unity Projects Crash before Opening.

I'm a complete Unity beginner, and I just downloaded Unity Hub on MacOS Catalina version 10.15.6. However, when I try to open a project, the Unity runner crashes, and shows up with this:

I'm running Unity 2020.3.0f1. I'll answer any questions in the comments to help diagnose the problem.

 

If there's compile errors there could be errors in your C# coding lad.

Ask an expert (not me then ) for some help with that.

 

Update:

Actually, I haven't coded at all. This is just me trying to open the projects for the first time

 

You use some asset / package what is incompatible with the version you're opening, it throws error and it has a custom window. But the error message / dialog says the same thing. You probably can find out more in the logs.

 

What happens when you choose "Load Default Layout"?