Can't be shipped to your address - Guidelines

Normally, the following error message appears to customer when  Shopify shipping rates are not found in the Shopify shipping settings associated with customer entered address on the checkout page.

Error Message:  Your cart has been updated and the items you added can't be shipped to your address. Remove the items to complete your order.

Please see the screenshot below as reference: 

To fix this issue, follow the steps below:

Step 1: Go to Shopify Admin > Settings > Shipping & Delivery

Step 2: Under General Shipping Rates, click Manage Rates.

Step 3: Make sure you have setup shipping rates for the customer location who is facing that problem.