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Disable the proxy settings
Sometimes, incorrect proxy settings can be the causers of ERR_CONNECTION_RESET and disabling them is all you need to do, in order to resolve the issue. To disable them, feel free to follow the steps below:
Click on the apple logo in the upper left-hand corner of the screen and select System Preferences;
Click on Network;
Select the network you are connected to and click on Advanced;
Go to the Proxies tab and then uncheck the check boxes under Select a protocol to configure;