also interesting was this thread
Hello community. After Unity Hub was update my project stop working. I have a message from it unity is already in list. you cannot locate the same version .
No one editor was running.
How to fix it?
[5226680--521078--upload_2019-11-29_12-41-32.png]
but then i finally hope it seems it is because i am regularly switching from wifi1 to wifi2 to ethernet adapters at my computer (now in corona times to have a better connection), and deactivatig some of these - or not - seems to trigger MAC adress detection problems?
see also
Hello,
I updated the Hub from 2.2 to 2.3.0 and now my project wont load. It works if i try to create a new empty project.
Unity version 2019.2.13f1
I tried restarting my PC and reinstalling the Unity Hub.
When i click to open my project it shows the loading screen, but then switches back to the hub after 2 seconds.
Any other ideas?
and the official solution
What's happening?
Currently, some of our Windows users who have disabled network adapters (including some VPN configurations) are experiencing issues with creating or opening projects via Unity Hub. This post offers the official suggested workarounds until a proper fix is available.
Okay, but what's REALLY going on here?
This section dives deeper into the functionality of licensing in Unity Hub and Unity Editor. Feel free to skip ahead to the solutions if you don't find this particularly i…