I have 2 ps's me and my girlfriend play and have own accounts im getting this error on both pc's and cant get in im running as admin and rebooted rooter one is 15-3570k, ssd, 660oc gpu other is i3-2100, ssd, and 650 ti neither loging in I am in north east England and both us were on game till 1 this morning.
just got message unable to communicate with external UI, exiting.......
if that help