As the title says, I can’t open a new project or even existing ones.
Could you please submit a bug report via the bug reporter so we can have a look at your log files?
If I will submit a bug from another version of unity will you get appropriate logs?
Does the bug reporter not launch? There is also a bug reporter via the Unity HUB
The bug reporter is a separate executable. You can find it in the directory where Unity is installed.
Hub > Editor > 2019.3.0b5 > Unity Bug Reporter.app
I had no idea about bug reporter inside UnityHub, thanks.