Soap Service Call Premature End of File / ParseError

We have created a service call using 2-Way SSL. The request message has been hard-coded with the required fields, but when we try to run the service, the following error message is provided: 

Caused by: org.apache.axiom.om.DeferredParsingException: javax.xml.stream.XMLStreamException: ParseError at [row,col]:[1,1] Message: Premature end of file.

Is there a way for us to see our request body or further details? The error message is unfamiliar and we are not sure how to debug.