Impossible to go to Tier 3 - The Curator BUG

Since completing the campaign, I have attempted to fully complete the Cathedral of Light dungeon 5 times. I have spent a significant amount of gold trying out different builds and testing whether the minion was causing the issue, but it wasn’t.

When can we anticipate a fix for this bug? It is one of the game’s most vital quests. This bug significantly hampers the pre-order experience, and it is disheartening to pay such a high price only to encounter such a major bug.