Hi
At first I installed unity 2019 2.17f1 and the unity hub 2.1.3 was installed with that and I was working by that properly.
After few days the latest version of unity hub means 2.3.0 by unity team was released.
Since I updated my unity hub, it never open one of my projects ever,
I uninstalled my unity and installed latest unities and uninstalled my unity hub and installed older unity hubs. I didn’t get an answer at all.
So I need a good way to solve this problem. I lost several days as a result of this problem.
Unity requires windows update KB2533623, which isn’t available to download on Windows since January 2020. I’d get the KB3063858 update, or, if possible, the KB4457144 update, and it should work then. If you can’t get both, you need to download KB3063858 at minimum. If you already have them, and it still doesn’t work, try to make a DEP Exception.