A proxy server is a server that acts as an intermediary between your computer and other servers. Right now, your system is configured to use a proxy, but Google Chrome can't connect to it.
Check your proxy settings or contact your network administrator to make sure the proxy server is working. If you don't believe you should be using a proxy server: Go to the Chrome menu > Settings > Show advanced settings... > Change proxy settings...> LAN Settings and deselect "Use a proxy server for your LAN".
Error code: ERR_PROXY_CONNECTION_FAILED