Hi sezrahhh,
Thanks for contributing to our forum. We have been seeing this error returned for some items on occasion and, while our technical team is currently looking into the cause of the errors, we are not entirely sure what is causing certain items to be rejected due to this particular error message at the moment.
However, we have noticed that almost all the listings for which errors of this nature have been reported have included images in the Optional eBay Gallery Images section so, assuming you are using these extra Gallery Images, you may find you can successfully post the item if you remove the images from the Optional eBay Gallery Images section first.
If you decide to attempt to post the listing without any Optional eBay Gallery images and the listing is submitted to eBay successfully, you should then be able to go to the eBay Revise your Item form and add your desired Gallery Images from there.
We apologize for any inconveniences this issue has caused you. If you need any further assistance with your account, please feel free to contact our Customer Support team by mousing over the “Help” tab within your account and selecting the “File Support Case” option.
-Mike