Fail to open project from Unity Hub

This fixed the error for me. I have unity hub 3.4.1 and Editor 2020.3.43f1. Maybe, somehow my Unity hub version got updated to 3.5 then after that I was having the same error. I did the same, went to the location "C:\ProgramData\Unity " and deleted the ulf file. I had the setup file for Unity Hub (3.4.1) from the past, so I reinstalled it. After that, it was showing me a license error so I signed it for its activation and later my projects were opened and created.

 

Thanks for posting this!

I just experienced this awful bug that the developers put out for us public testers since yesterday. I can't open any file I previously worked.

I also realized last night that my Unity Hub was updated to 3.5 and then I had issues.

Where did you download the previous Unity Hub Setup? I have spent some hours already searching with no success!

Could you share your Unity Hub Setup exe file?

 

https://drive.google.com/file/d/1YGUhnLao-p9OjUnUz7ViYSh_9iyLAS8d/view?usp=sharing

Here is the setup I had, Unity Hub 3.4.1

 

I solved it. Kindof. I had the Same problem and I uninstalled and reinstalled it but still no use. So I solved it by first uninstalling everything i.e Unity and Unity Hub using control panel. Then I Searched for my Unity file and deleted it. This file is generated during the first installation and after you uninstall and reinstall it then this same file is used and some error in this file causes the problem(I don't know what it is tho). After deleting the file I reinstalled everything and this time it asked me for directory to put the new Unity file in. Since its new it works. Remember this file is named only Unity and is like the main file for your projects. In my case I kept my file in D Drive so this(see image) is the message I got. Similarly your file can be in the same path

 

me to help