SOAPUI/BizTalk: HTTP/1.1 415 Cannot process the message because the content type ‘text/xml;charset=UTF-8’ was not the expected type ‘application/soap+xml; charset=utf-8’.

When using SOAPUI to send a request to a BizTalk Server WCF receive location (receive location is hosted in IIS), you receive the following error:

HTTP/1.1 415 Cannot process the message because the content type ‘text/xml;charset=UTF-8’ was not the expected type ‘application/soap+xml; charset=utf-8’.

Reason: messageVersion of the textMessageEncoding extesion is set to “Default”.

Solution: Change this to “Soap11WSAddressing10” and the issue should be resolved.