Hello @Support1_IT,
There is something strange in your redirection, you are adding a question mark ? at the end of every redirection, maybe it is worth to re-check your redirection rules.
curl -IkL server.cscp.net/.well-known/acme-challenge/test
HTTP/1.1 301 Moved Permanently
Server: nginx/1.4.6 (Ubuntu)
Date: Tue, 04 Jul 2017 17:53:39 GMT
Content-Type: text/html
Content-Length: 193
Connection: keep-alive
Location: https://server.cscp.net/.well-known/acme-challenge/test? <-- that ? should not be there.
HTTP/1.1 404 Not Found
Server: nginx/1.4.6 (Ubuntu)
Date: Tue, 04 Jul 2017 17:53:39 GMT
Content-Type: text/html
Content-Length: 177
Connection: keep-alive
Cheers,
sahsanu