Error with https://www.couchbase-ruby-orm.com/docs/tutorial-ruby-couchbase-orm/encryption

exception = HTTPSConnectionPool(host='couchbase-ruby-orm.com', port=443): Max retries exceeded with url: /docs/tutorial-ruby-couchbase-orm/encryption (Caused by SSLError(SSLError(1, '[SSL: TLSV1_ALERT_INTERNAL_ERROR] tlsv1 alert internal error (_ssl.c:992)')))