QUIC (Quick UDP Internet Connections) is a service that provides Google’s servers a TLS/SSL equivalent connection, and disabling it might help you fix the ERR_SSL_PROTOCOL_ERROR issue. This protocol is enabled in Chrome, by default. To disable it follow the steps below:
Note: If disabling the protocol didn't help, make sure to revert the changes you made, following the steps below and setting the protocol to Default.
Incorrect date and time settings might be responsible for the ERR_SSL_PROTOCOL_ERROR error. Set the correct time and date in your device and try visiting the website again.
Maybe the antivirus itself, i.e. its settings, is responsible for this error message. Check out the settings, apply necessary modifications (ask the support staff of the antivirus software for advice) and reload the browser.
Since getting the ERR_SSL_PROTOCOL_ERROR is quite random, a solution like restarting the web browser can be very efficient. Just close the web browser and reopen it again and you should be able to access the website you wanted.
Clearing the cache files might be all you need to do to resolve the issue. If you are not sure how to clear the cache, check out the don't know how to clear the browser cache guide. Also, you might want to consider clearing the cookies (to learn how, check the don't know how to delete browser cookies guide).
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