Unable to login after install


I have just installed Nextcloud in Unraid. But I cant login. I have installed Nextcloud and then created a admin user. When I click create the page loads and I get an error.

After I refresh the page I come to the login page.


But regardless of what I typ in I come back to this exact page. No error even if I typ in a wrong password.

I have tried installing it multiple times. I even uninstalled unraid and formatted all disks.
Has someone an Idea? I think it is a problem with the new nextcloud version.