I have been disconnected for "session invalid" or "authentication failed" probably 10 times today as well. I've logged into buddyauth.com to clear stale sessions, but sometimes it just says authentication failed when clearly it shouldn't have. The servers appear to be having serious issues today. Edit: It seems like it's a bigger problem.
http://www.thebuddyforum.com/buddy-bots/announcements/78141-official-server-issues-oct-18-2012-a.html
Yea, give this a few. The sever seems to be a little bogged down at the moment. You do have to think it is the weekend and a lot of people are using this. When you Authentication fails, wait for a little and or you can still use it offline. So when the error report comes up click on use offline.
Yeah same Problem here Either Tile map is empty or random disconnects with "session is invalid" i hope they will fix this asap, just bought honorbuddy after using 'free bots' for some time now. i wanted something stable, but at the moment i must say, these free bots ran better then honorbuddy now