Getting Error code=β€œ001” for a Soap xml service in postman

Any idea on the error code=β€œ001”? getting the below in postman for the API url and the request body I am sending. Is this something issue with the input requests to the web methods?

<ser:CommonResponse xmlns:ser=β€œhttp://service.sterling.lowes.com/scheduling/2015/9”>
ser:returnString<?xml version=β€œ1.0” encoding=β€œUTF-8”?>
<ShipNodes ErrorCode=β€œ001”/></ser:returnString>
</ser:CommonResponse>

Can you please attach some screenshots from Postman with the request body, headers and the response body? Thanks!

Thanks for checking. Attached headers, request and response body snapshots.

Most SOAP API don’t react well to the Content-Type application/xml. Could you try text/xml just to make sure this is not the issue?

Also select XML instead of Text in the editor. This can help identify potential errros.