When generating Shipping Label for USPS, "Whitespace is not allowed at this location" error will prompt
The cause of the issue is the Ship From Name has special characters. Remove the '&' or any special characters in it. Then, try to generate the label again.
Note: Applicable for USPS only and for the following fields below.
1. Ship From Name
2. Ship To Name
3. Ship From Address
4. Ship To Address
Connected Business 13 and higher