When the user is out of zone and on checkout screen the popup is being shown saying "Result not defined".

Is your feature request related to a problem? Please describe.
When the user selects the zone and orders the food and then adds the address and that address is out of the delivering zone then this error is being produce.

Describe the solution you'd like
When this scenario happens then at the place order screen there should be a popup saying "We don't deliver in this area. Please add your address correctly." And after adding the address again the user should be redirected to the place order/checkout screen.

Reproduce the checkout flow: select a delivery zone, add an address outside that zone, and reach the place-order screen. Trace the frontend checkout and address-validation entry points; the issue names no files or tests. Done means the user sees the specified delivery-area message, can correct the address, and returns to checkout without the "Result not defined" error.

Written by the indexing model from the issue text.