What is a net :: ERR_SSL_PROTOCOL_ERROR?
The ERR_SSL_PROTOCOL_ERROR is a problem with the encryption protocol that prevents data from being transmitted securely. The message can display when you're trying to visit a website using the HyperText Transfer Protocol Secure (HTTPS).
How to disable ERR_SSL_PROTOCOL_ERROR in Chrome?
Fix ERR_SSL_PROTOCOL_ERROR by disabling QUIC Protocol
To disable it, copy chrome://flags/#enable-quic and paste it into the address bar, hit enter. On top of your screen, the Experimental QUIC Protocol would have been set as Default. Disable it and relaunch Chrome.