[ARCHIVED] Discovery Quests won't go away/Constant Messages popping up

I’m having the same issue, but I haven’t been playing the Reaper event. I can't get the discovery quest to go away, even though the box is unchecked in the settings menu. It's the quest that gives you money, but the quest has to be glitched itself because I'm not completing the goals, but it's still giving me $400 like every two seconds. It's making the game unplayable.

I've restarted and now I'm repairing the game. Fingers crossed.

EDIT: Restarting and repairing did nothing.