Stuck in the Temple of chaos

Hello, I am currently stuck in the temple of chaos, room 3.
I cannot leave via the portal since it doesn't work in the Temple of chaos.
It seems I skipped the part where The Trialmaster spawns the adds, and now at end of the room after completing it without any adds spawning, nothing happens. I am stuck.
I tried changing servers without avail.
Is there a way to get un-stuck ?
Thank you for your help.