Clear cache, check ssl, and update your browser for a quick fix. Learn how to fix the err_ssl_protocol_error with easy steps Err_ssl_protocol_error often indicates an expired, revoked, or improperly installed ssl certificate
"www.xnxx.com sent an invalid response. err_ssl_protocol_error" - imocan.com
Whether you are the site owner or just trying to load a website, you can check a website's ssl certificate using qualys's ssl server test.