Trial of Corruption - Jamanra (unable to complete - no portal)

I beat Jamanra. When it ended, it would not allow me to enter the portal that spawned. (The one that takes you to the caravan shrine room I think?). Now a portal will not spawn and I seem to be stuck here. I’ve completed it 3 more times, and with someone who hasn’t yet. No fix. I need help. It seems I’m locked in this quest.