How to fix Chrome browser error 'Error 15 (net::ERR_SOCKET_NOT_CONNECTED)'

This error shows up once in a while in Chrome browser:

"Error 15 (net::ERR_SOCKET_NOT_CONNECTED)"

To fix this error just go to “Tools” --> “Clear Browsing Data” and select the cache and cookies. After which the website opens without a problem.

If the above fix doesn't work try this update from @ubuntuswitch:

 Lasse Heindorff Kristiansen: For anyone Googling this later, so they will find the answer immediately:

1. Close whatever tabs you have open/save whatever needs to be saved, since Chrome might kill any open connections and/or crash.
3. Open a tab in Chrome and copy this into the address field: chrome://net-internals
4. Click the "Sockets" tab
5. Click "Close idle sockets" + "Flush socket pools"