1. Clear the game cache (cog icon in the top right > clear up system)

2. Flush the DNS cache (open ‘command prompt’ on the PC and type ``ipconfig /flushdns`` and hit enter)

3. Reboot the PC (to be extra sure, reboot the modem / router too)

Perform the steps in that order, see if that helps. If you cant get into the game, just do steps 2 and 3.