InterfaceDetermination did not yield any actual interface

I am working on a web service to web service scenario. While trying to resolve issues with the response processing, I seem to have broken the request. But it did work. Now, when I try to hit the integration's endpoint I get generic error response but in the Communication Channel Monitor for my channel I see this error: "InterfaceDetermination did not yield any actual interface". I have read all the related post I can find, I've added and removed the xml namespace on my inbound message but here are few other suggestions that would apply. Below are the key configuration screens. Is there any other way I can see what is the cause of this problem? And, any suggestions to resolve it would be very helpful.

The response seen in SOAP UI

<SOAP:Envelope xmlns:SOAP="http://schemas.xmlsoap.org/soap/envelope/">

   <SOAP:Body>

      <SOAP:Fault>

         <faultcode>SOAP:Server</faultcode>

         <faultstring>Server Error</faultstring>

         <detail>

            <s:SystemError xmlns:s="http://sap.com/xi/WebService/xi2.0">

               <context>XIAdapter</context>

               <code>ADAPTER.JAVA_EXCEPTION</code>

               <text>See log trace with id: n/a</text>

            </s:SystemError>

         </detail>

      </SOAP:Fault>

   </SOAP:Body>

</SOAP:Envelope>

Message Type:

Service Interface

Operation Mapping