It’s been happening to me when I’ve tried to go into dxun operation via group finder. Happened twice to me this afternoon. First time before the servers went down and after about 1800 gms. First time was on onderon and second time I was on ilum. I couldn’t chat at all either in guild or general. Tried logging out and also tried restarting my laptop, when back in I was no longer in my guild but can see members logging in and logging out. I hope this is sorted soon and helps