Yeah… I know, the following content is for the docker-compose installation, but it might help you investigating and solving your problem. I am passing the call to zammad from a remote nginx, there I collect certificates and this is my machine with listening ports 80/443. Can you provide apache2’s error details?
zammad docker
token error
see CSRF Authentification failed - #11 by synesty
in short:
docker exec -it zammad-docker-compose_zammad-railsserver_1 bash
rails c
Setting.get(‘http_type’)
=> “https”
Setting.set(‘http_type’,‘http’)
quit
exit
docker-compose down
docker-compose up -d