I have technical problem with a dragon nest quest that i have had no help with on the forums.

I was doing apocrypha 4 repentance and i talked to rajuul in the dungeon. After i talked to him, the quest was gone. I continued in the dungeon, and when i beat the boss, the screen said i needed to finish a quest to leave the dungeon, but i had no quest and nothing was there i could interact with. After i left, i couldn't find the start of the next quest anywhere. After searching, i returned to the original dungeon, and once again, once i beat the boss, the screen said i needed to do something to do the quest, but again, there was nothing i could interact with. The quest is completely broken as i can't start the next quest.