Problem: The Novices aren’t spawning during the final boss fight, prohibiting players from charging the hammer and breaking the seal.
We’re aware of the problem and are working on it. It does not effect 100% of the players. If you engage/agro the Novices before the boss takes the hammer back from you at the start, that seems to cause the issue when it does happen.
Meanwhile we have found a workaround while we try to resolve the problem with a patch. If the entire party wipes and restarts from the checkpoint, it could fix the problem.