The phrase comes from the world of Le Donjon de Naheulbeuk, a long-running French fantasy parody that began as an audio saga and later grew into comics, novels and games. Its humour comes from incompetent adventurers whose quests constantly go wrong, so a line announcing that trouble has already started fits the series perfectly. Shared on French soundboards and in meme edits, it has travelled beyond its original audience because the situation it describes is universal, even for listeners who have never followed the saga.