Err_ssl_protocol_error often indicates an expired, revoked, or improperly installed ssl certificate 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. Clear cache, check ssl, and update your browser for a quick fix. How to fix website sent an invalid response err ssl_protocol_error highlights an ‘err_ssl_protocol_error’ means your browser has trouble establishing a secure connection to the website. Do you keep seeing err_ssl_protocol_error repeatedly while attempting to access a website or web page in google chrome Usually, that happens when the browser has trouble using the ssl (secure socket layer) protocol to establish a secure connection with the site.
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