eBay requires that the title of your listing is at most 80 characters. Once your title is more than this, your listing will be rejected by eBay with this listing error. 

To resolve this, edit your listing and make the title at most 80 characters, then save and publish your listing again to have it successfully listed on your eBay store. 

Contact support at customer-success@syncommerceapp.com if the problem persists.