I started with the quest "Waking Nightmare", my character is Lvl 27. We followed Erandur to the entrance of the Nightcaller's Temple. Talked to him before entering and listened to his warning about the place. He rushed to the temple before me and I followed him. When I entered the temple he was missing.

So I went out again and re-entered the temple. Still no Erandur to be found. So I cannot continue the quest by myself coz he has to throw magic fire on the wall. (I tried to cast flames and firebolt, but it wouldn't work for me)... What am I doing wrong? Is this a glitch? How can I continue with the quest? THanks for your help!