Why isn't my fhir resource validating against a profile? - dstu2-fhir

Question

I'm trying to validate an instance of the resource type 'Basic' against the following profile which I've created: https://simplifier.net/Crew/questionResponse
I have uploaded the profile to my local HAPI server, I then try to upload a resource and have it validate using the following url: {{URL}}/Basic/$validate?profile={{URL}}/StructureDefinition/stelar/profile/questionResponse
This is the resource:
<Basic>
<meta>
<versionId value="1.0"/>
<lastUpdated value="2016-11-04T16:54:45Z"/>
<profile value="http://stelar.org/StructureDefinition/stelar/profile/questionResponse"/>
</meta>
<text>
<status value="generated"/>
</text>
<extension url="http://stelar.org/StructureDefinition/stelar/extension/subjectNo">
<valueString value="ABCDE"/>
</extension>
<extension url="http://stelar.org/StructureDefinition/stelar/extension/followUp">
<valueCoding value="FollowUp.1Y"/>
</extension>
<extension url="http://stelar.org/StructureDefinition/stelar/extension/methodOfFollowUp">
<valueCoding value="FollowUpMethod.ClinicVisit"/>
</extension>
<extension url="http://stelar.org/StructureDefinition/stelar/extension/variableLabel">
<valueString value="Has your child had bronchiolitis? At what age?"/>
</extension>
<extension url="http://stelar.org/StructureDefinition/stelar/extension/quName">
<valueString value="Questionnaire 1"/>
</extension>
<extension url="http://stelar.org/StructureDefinition/stelar/extension/aIW">
<valueInteger value="564"/>
</extension>
<extension url="http://stelar.org/StructureDefinition/stelar/extension/respondent">
<valueCoding value="Person"/>
</extension>
<extension url="http://stelar.org/StructureDefinition/stelar/extension/dateID">
<valueDate value="1989-06-02"/>
</extension>
<extension url="http://stelar.org/StructureDefinition/stelar/extension/quSubject">
<valueCoding value="Person.StudySubject"/>
</extension>
<extension url="http://stelar.org/StructureDefinition/stelar/extension/dataSource">
<valueCoding value="DataSource.Questionnaire"/>
</extension>
<extension url="http://stelar.org/StructureDefinition/stelar/extension/dataResponse">
<valueDouble value="6.7"/>
</extension>
</Basic>
When I upload it to happy I get a non numbered error code returned with the message 'Unexpected failure while validating resource'. I'm not really sure how to find out why it was failing though.
How do I go about this? Can anyone spot what the issue with my form is?

Answer 1

The Basic resource has a code field that is mandatory, see the definition. Your resource doesn't specify this field.
Not sure if this is why Hapi isn't happy, but it is a validation error.