Any known issues

My family play an online game called Stronghold Kingdoms, we have been playing for over 3 years now, as of yesterday we can not get onto the game due to connection timing out intermittantly, sometimes it loads and sometimes it doesnt, our ISP has no issues with it and our firewall is off, I noticed Norton had done an update and wondered if this could be the problem.Program rules are all set to 'allow' for this game

Please advise