You cant interact with Imp Mother Dyala in Dreadscare Rift (Warlock Classhall) to buy the Grimoire of the Darkfire Imp. She is clipped into the ground.
Edit:
Relog to fix this.
she’s still bugged for me as of 04/12/24, I’ve tried relogging, logging out completely and it doesn’t work
Have you reported it to Blizzard yet?
Hi Shirena,
The Imp Mother has always been a bit… difficult to reach, but it should still be possible with some relogging, getting as close as you can and some good old ~clicking around a bit~
It’s definitely not ideal, but is probably not going to be receiving work anytime soon. I hope you can still get it done!