Error with http://keloran.github.io/jQuery-BBCode-Editor

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