The same problem, but it's strange. Because first time when I cast cloud of daggers, everything was ok. It was when I fight with a Bugbear killer, who wants to slay a Tiefling near the telescope in the Druid Grove.
Next two times when i used cloud of daggers, there was crash. First when I cast it in the secret passage beyond the Druid Grove (fight with the goblins, I tried to cast it on two goblins). Next time in fight with the harpies.