Hello
Recently setup Zammad behind Traefik, this helped me : CSRF Authentification failed - #10 by pqcomputers
If you’re using docker, you’d like to have this handled automatically for you, so make sure to use a .env with : NGINX_SERVER_SCHEME=https set.
Check if it’s correctly set with docker compose config | grep 'NGINX_SERVER_SCHEME' <== should display the var and its value, at least for nginx service. If it doesn’t, make sure to use a env_file section in your compose file, should do the trick.