However, if you want to continue using the VPN or Proxy server to connect to the internet, you can try methods 2 ~ 5 as listed below to fix Err_Tunnel_Connection_Failed Error in Chrome. The easiest way to fix Err Tunnel Connection Failed error in Chrome would be to disable the Proxy server on your computer and re-load the webpage that you were trying to access.
How to Fix Tunnel Connection Failed Error In simple terms, ERR_TUNNEL_CONNECTION_FAILED Error in Chrome can be described as an occasional inability of the Chrome browser to resolve VPN or Proxy connections on a Windows computer.