Killed dominus, cannot enter highgate, cannot return to aquaduct

Just killed Dominus on normal, I didn't talk to dialla but went through the door at the top of the tower and arrived in the aquaducts, all as usual.

I can't remember if I saw or talked to dialla in the aquaducts but having worked my way through to highgate I could not enter town and received the message "You do not have the required quest state".

Thinking I needed to talk to Dialla I portalled back to Sarn expecting to WP to the beginning of the Aquaducts and find Dialla there but found that I didn't have the aquaducts WP, when I tried to go back through my portal to run back to the WP I got the same "You do not have the required quest state" message.

My A3 quest page says i have completed the sceptre of god/kill dominus quest, my A4 says I have started the "Eternal Nightmare" quest and that Dialla has asked me to go to Highgate.

That's all I can think of, will try killing dom again in a bit to see if it works second time



EDIT: On re-killing dom, I can access the aquaducts, got the WP and into Highgate, everything seems normal :)