This is one reason why Etsy can reject a listing that you are creating. It happens when the Etsy shop section you have provided for the listing is more than 24 characters.
Etsy only allows up to 24 characters for shop sections. To resolve this, edit your shop section to be within 24 characters, then save and publish your listing again to have it successfully listed.
Contact support at firstname.lastname@example.org if the problem persists.