Error loading DeppholmTile 30_31

I get an error in the navigation tab whenever doing the quest "Explosive Bounding Compound" near the quest giver and it try's to load the tile Deepholm 30_31 and then I get the error, here's my log.

EDIT: After several HB restarts and WoW restarts it finally got past the error but still you can look into it and see the cause of it in the first place

 

Thanks if it happens again I will