Error with https://thepatternlibrary.com/

exception = HTTPSConnectionPool(host='thepatternlibrary.com', 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 'thepatternlibrary.com'. (_ssl.c:992)")))