Give this a try. In settings: Go to HUD, click Save UI. Go to Key Binds, click Reset to defaults. * -Try sitting in chair by double clicking it- Go to HUD, click Load UI to restore any key bind changes you made. * * Might have to relog after this step.
To add to this, if you are still in the Library or Potion room when others reach the final boss and you accidentally hit No Now on the prompt to teleport to it, you are stuck for the rest of the TFO until the others finish it.