Are you seeing any error messages when trying to process this address? If, so please send a screenshot of the error.
Are you using test mode by any chance?
It is always good to check that your shipping rates and regions are set up correctly as mentioned here in our help center doc. Any additional information you can provide would be helpful!
Maz | Social Care @ Shopify - Was my reply helpful? Click Like to let me know! - Was your question answered? Mark it as an Accepted Solution - To learn more visit the Shopify Help Center or the Shopify Blog