You don't appear to have any lighting. If that is an env_sun in the middle, that does not provide any light. It just adds a sun sprite at the location you tell it.
In the middle is a light_environment and i even tried putting a light in it. I also put accidently a skybox into the ground whoch seemed to be the problem. But thx for your reply.
If this is your first time logging in after the migration (Feb 8, 2022), you must reset your password to log in. Follow this guide if you're having trouble