How to solve "Some items are no longer available. Your cart has been updated"?
On the cart page, you may see the message " Some items are no longer available. Your cart has been updated". Shopify blocks the customer from inputting the address.
It means that the location doesn't have a correct shipping profile. You should visit BYOB => Setting => Fulfillment to check the current location to store the dummy variants. After that, you can set a profile for the location or switch to another one.
By default, our app uses the first active location fulfilled by you.