In the maintenance notes it says they "Fixed one of the subquests in the Ruin Fortress that could not be received."
The quest can be received. Its just not able to be completed. At least I can only guess that 'one of the subquests' means Tidy Up Please! in particular because its the one that's bugged in the first place. I tried abandoning the quest and accepting it again in hopes that might solve it (and even quit the game), but that doesn't seem to work.
Dusty is supposed to be standing in the room but he's no where to be seen:
SWScreenShot_20191010[09-39-51].jpg
Anyone else still can't complete this quest, too?