For some reason I keep running into this issue, and I have NO IDEA what I did wrong. I downloaded a fight class, it worked fine for a bit. Now I will load it and start it up and nothing happens. I can't even get my guy to default auto-attacck - this is VERY frustrating.

Shit, i left my crystal ball at work...I have no idea whats going on.

 

Without letting us see what your configuration / fight class looks like, no-one can magic up an answer for you...

Attach the logs / fightclass to get any type of help.  Your lack of effort  is VERY frustrating

I went back and tried to diagnose the issue myself - it ended up being an addon problem. Disabled, worked fine.