@NH13 Welcome to the community.
The “Address not supported” message—this issue crops up when there’s a mismatch between the customer’s address and your configured shipping settings.
It means the address they entered isn’t covered by any shipping profile or region you’ve set up in Square Online.
Even perfectly valid addresses will trigger the error if they fall outside the zones you enabled or if rates aren’t set for that area.
Things to try.
• If the customer’s address is outside your current shipping zones, add the missing region.
• If inside the region but rates are missing, add a rate (flat, weight-based, etc.).
• Then publish and test again to confirm the error is resolved.
Review Shipping Profiles and Regions
• Go to Online → Settings → Shipping in your Square Dashboard.
• Under each shipping profile, make sure:
• All intended countries/states/zones are included.
• Each region has a shipping rate configured.
• If using multiple profiles, double-check that the item is in the correct one covering the customer’s region.
