Error with https://hockeyfans.ch

exception = HTTPSConnectionPool(host='hockeyfans.ch', port=443): Max retries exceeded with url: / (Caused by SSLError(SSLCertVerificationError(1, "[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: Hostname mismatch, certificate is not valid for 'hockeyfans.ch'. (_ssl.c:992)")))