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Checking the proxy and the firewall

ERR_CONNECTION_CLOSED

Check your Internet connection

Check any cables and reboot any routers, modems, or other network devices you may be using.

Allow Chrome to access the network in your firewall or antivirus settings.

If it is already listed as a program allowed to access the network, try removing it from the list and adding it again.

If you use a proxy server…

Go to the Chrome menu > Settings > Show advanced settings… > Change proxy settings… and make sure your configuration is set to "no proxy" or "direct."

www.ouedkniss.com unexpectedly closed the connection.