Nextcloud as Docker on Unraid (SOLVED)

i installed Nextcloud Docker with Letsencrypt, (now SWAG) as a reverse proxy, on my Unraid Server. At the Moment I am having a Problem with the Nextcloud Docker, as I can no longer access the web interface. When I open the Domain I get an error 400 “The plain HTTP request was sent to HTTPS port”, the error persists even after a complete reinstall of nextcloud. Nextcloud itself starts without any error messages in the logs.
Thanks in advance for any help.