Symptom
After customers enter their address into an order, they encounter an "invalid address" error message. One customer writes:
"I can’t order anything through your online store. I enter my address (in the United Kingdom) but when I try to proceed, I receive a message about an invalid US address with ’no shipping methods found"
Resolution
This problem occurs when the address service is used (AppConfig: Vortx.OnePageCheckout.UseZipcodeService ):
Vortx.OnePageCheckout.UseZipcodeService set to TRUE is
incorrectly pulling in United States for other country zip/postal entries
To fix the issue,
In other words, make sure it is set to FALSE.