As per the error message, eBay requires you to set up a billing method with them before they enable your seller account.
In order to do so, you can do the following: Access your eBay account and introduce you billing details. If you are not able to find the section, please contact eBay via the chat on their site and request them to send you the link to complete your billing details. Once you have updated this information, come back to My Listings section in HGR and click on Retry on the listings that are currently showing this error.
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