Hello. On my Seller Hub, when I click "Store," I don't see any category to create. Also under my active listings, when I click "Edit" to see the drop down menu, again, there is nothing related to categories. Any assistance is greatly appreciated.
The problem @dealdynamos is that you do not have an eBay Store subscription, therefore you cannot create custom store categories. With only 137 listings you don't really need a Store subscription.
