@toreog said in ERR_QUIC_PROTOCOL_ERROR:

ERR_QUIC_PROTOCOL_ERROR

Are you using a VPN or a proxy? What website(s) were you trying to access? The error comes from your browser attempting to make use of of the Quick UDP Internet Connection protocol of certain web apps, mostly employed by Google and YouTube sites. Possible causes are typically the particular website and how it implements the protocol, Internet connection issues, or certain browser extensions.