Hey Gabosaurus,
I tried to reproduce your issue but couldn’t get it to occur on my end. I’ve got some questions for you to help us track it down and fix it!
Would you be able to share any of the console errors you’re receiving in the console? Seems like there is some NullReferenceException error.
Sometimes when projects aren’t working correctly but should be, it could help to try a Reimport of the project - to do this right click anywhere within the project window and select “Reimport All”. This process goes through importing every asset into your project as if it was opening it for the first time - which can oftentimes lead to a fix in case some files didn’t import correctly upon initial opening. Alternatively, deleting the Library folder from your disk where the project is stored can have the same effect (This folder will be reacquired when the project is opened again).
Good luck and keep us updated!