Solution - Disable Experimental QUIC protocol

  • Open Google Chrome.
  • In the address bar of the new tab window, type chrome://flags/ and press Enter.
  • Don’t get dismayed at a warning message that says Careful, these experiment may bite. Once you see it, click Command + F simultaneously to open search box.
  • Type QUIC in the “Find” text entry field.
  • Scroll down and you should see Experimental QUIC protocol highlighted.
  • Change the selection to Disabled from the drop down menu.
  • Finally, Quit Google Chrome (you need to actually quit Chrome and not just close the current window).
  • Start Chrome back up again and go to Google Mail