Why am I getting the error : "Access denied (not owner)" while connecting my Etsy Shop?

Why am I getting the error : "Access denied (not owner)" while connecting my Etsy Shop?

If you are logged into an Etsy Store but placing the Shop Name for another Etsy Shop, you will eventually come up with this error.

To fix this, make sure you are logged into the correct Etsy store when you authenticate the shop name in the application