I've started the quest without issues, proceeded through the three trials and spoke to Sapadal using the adra stone. However, once the cutscene ends (I've accepted Sapadal's power), the game is stuck on the step "speak to Sapadal using the adra". Given that I've already spoken to Sapadal, the adra won't activate. Additionally, the area is locked around the adra, preventing any further progression (I can't even move away and teleporting is blocked).
I'm on Steam, patch 1.2.2.
Take care,
Aura