It's the Chult temple actually, I thought I had put that but, then again, it's almost midnight and I've been playing a PC game since 6

I found the answer though, apparently, because my paladin refuses to wear the robes, my group couldn't talk to anyone, so we just killed them all. One more question though, I have the latest patch, but I can't get to the last needed pillar next to the snake statue, it says it's locked and my rogue can't get to it to open it. I tried reloading, but that didn't help either. Any ideas?