What does this error mean?
eBay will show this error when a return policy is missing or the policy does not meet certain criteria.
How to fix:
eBay commonly updates rules on what return policy settings are allowed for certain categories and items.
For example: Sometimes, you must provide free 30-day returns for some items and categories. For specific details on what your policy must be, you may find the answer here in this article, or contact eBay support to get specific details.
We recommend modifying your eBay Business policies (or creating a new one) to favor the buyer's ability to return the item.