Clear cache, check ssl, and update your browser for a quick fix. One minute you are browsing, the next you are blocked by a screen that says your connection is not private Err_ssl_protocol_error often indicates an expired, revoked, or improperly installed ssl certificate
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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.
By following the outlined solutions, such as clearing the ssl state
Erifying the ssl certificate, and checking system settings, you can restore your site’s secure connection. Following the nine practical solutions presented in this guide works for resolving err_ssl_protocol_error on chrome as well as android systems, and localhost platforms This article explores both the factors that generate ssl protocol errors, together with resolve methods specific to various browsers and systems. There are few web errors as abrupt and confusing as the err_ssl_protocol_error
