If you are receiving that error it can be related to a mismatch of your product Media count in Suredone and Ebay. The origin of the error can be a dead image url or recently added images to the listing. Please, keep in mind that listings with variations will not be able to be revised if you try to change the Media.
The only way to fix the errors above would be to end your listings as relist them again. This is also what you will have to do when you change variation attributes in the future.