Fix: Fix server error when using the "Validate billing country" or "Enhanced sales tax number validation" settings
This version fixes a bug where the "Validate billing country" or "Enhanced sales tax number validation" settings could produce a server error.
The fix for this issue has also been added to v4.1.0, so if your license has expired between the release of v4.1.0 and v4.1.0.1, it is not necessary to renew your license.