Microsoft Dynamics NAV codeunit fails to run with "Root element is missing" when making an external web services call

Microsoft NAV codeunit fails to run when making an external web services call
“A call to System.Xml.XmlDocument.Load failed with this message: Root element is missing”
The web services URL is otherwise working returning XML response through any other means

Please guide through troubleshooting or provide with helpful advice what needs to be changed to make the code work

Gleb LisikhAsked:
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