unable to join guild due to error message about territory battles

I can confirm that I was able to rejoin my guild after some tinkering around. 

When that message appeared, i couldn't access anything related to guilds (guild events, guild store, etc) and for all intents and purposes it showed that I wasn't in a guild.  When my guild leader checked the guild roster, it showed that I was in the guild and they were at 50/50 members.  Unfortunately for me, with no way to access the guild portions of the game I wouldn't have been able to join TW.

We were able to resolve the issue by having the guild leader boot me from the guild, then I used the Guild Search feature to seek out my guild and request an invite.  Once I received an invite in that manner I was able to rejoin my guild properly and access guild content correctly.

Hopefully this can act as a guide for others who encounter a similar situation.

Cheers!