[Priest Class Mount] Scenario script not working

[AraTheRandom]

WoW Freakz link: https://www.wow-freakz.com/quest_helper.php?quest=45789&&name=the-sunken-vault
Bug description: When I enter the scenario of the quest, everything works up until the Caretaker should explain what a Seeker is, once the female dwarf asks. Thats when everyone stops following the script, and they just stand there forever. The NPC is supposed to start talking on their own again and start walking to the side of the vault, but that doesnt happen, no matter how long i wait. I tried re-entering the scenario, re-taking the quest, i disabled all my addons, i deleted the game cache, and i used the site unstuck in probably all orders. Nothing changes regardless of the numbers of tries. The caretaker always stops talking at the same part.
Proof: https://imgur.com/a/qepgeRf