Demi Ellisson

I uploaded my textures (JPEG) and added them to the correct faces of my mesh. I've logged out and back in since with no problems affecting the textures, theyre also in my inventory so I know they're not temporary (not to mention spending over 100L on the uploads). Now all of a sudden certain textures appear grey, not only for me but others as well. This is a big issue because I have been selling an item to customers that's now bugging out and I do not have enough to reupload all the textures. I want to know why this is happening and how I can fix it.