Error: A mixture of Self Hosted and EPS pictures are not allowed.
eBay only allows you to host images from one source. This error crops up if you have some images that are hosted by Listing Mirror and other images that are hosted by eBay directly.
The recommended workflow for solving this issue is to add all the images on Listing Mirror. Then the item would have to be give an End and Relist by following the procedure here: End And Relist.