That's the reply from Ebay. Pretty disappointing considering the fees we pay...Hello,When using the eBay sales channel there are some restrictions placed on the API by eBay.An API is what is used to exchange information with eBay concerning the listi...

I follow this. I am in the same situation.Tried to add Multi Buy on Ebay and I get the same error, and the Multi Buy option is not on the sale channel. #support