A quick solution to the Items in your cart cannot be shipped error when using Product Customizer with Zapiet: Store Pickup + Delivery can be quickly fixed with the steps below:

First, go to your Admin and select Products. Search for Item Customizations and select it:

Modify the following attributes of this product:

- Charge Tax

- Set SKU to 99999 and Barcode to 00000000000000, Track Quantity and set to 1 (Available) then enable Continue Selling When Out of Stock

- Enable Shipping and set weight to 0.1g, select the country your shop is originated in under Customs Information

Save and you should be all set!

*** Note that this will affect all products added to cart going forward.