I've tried pasting the original image as well as other mod images back in over the new mod. Neither works. I've also tried a pc reboot.

Edit: The strangest thing is that is it ONLY on this user. I just tried the game on a fourth user and it works fine.

Edit 2: Fixed Finally! I completely deleted the collectibles image file, rebooted the pc, then added it back and it worked! Whew! Thanks for the help.