Do you see the "sorry this selection is currently unavailable" displaying on your product?
HOW TO FIX
Go to the product on Shopify admin dashboard.
Under Inventory, Tracked Quantity will be checked by default for new products and Quantity available will be 0
To fix, enter a number above 0 for Quantity.
Save, and refresh your product page. Message should be gone.
If you need further assistance, feel free to get in touch with us and we would be happy to help you out.