Traefik ACME - Netcup returns no zone for domain

Dear selfhosting community, I'm currently setting up Pangolin (Reverse proxy) on a Hetzner VPS. I use a Netcup .de-Domain with CloudDNS and have A-Records for @ and * pointing at the IP of my VPS where Pangolin ist hosted. When trying to complete the DNS challenge Traefik returns that it could not create a TXT record via Netcup's API because the zone for my domain could not be found. I already tried fixing the problem by setting different values for the Polling interval and the propagation time. As you can