Could a name change of the server result to this error? I changed the Server name too and got a warning that the name should be max. 9 characters. In the IIS Manger only a part of the computer name shows up.
Edit:
I’m pretty sure something went wrong after renaming the Server. I tried to change it back to the default name. It still does not work, but i get a different error message. It loaded more of the layout