Custom Opportunity Panel Cannot show in Redwood under Contact Foldout page

Summary:

Hi There, we need to separate out the opportunity records into two panels based on sales method, and are trying to do it under contact foldout page. We are trying to use the Adpative QBE or ADF QBE for query but neither were successful. Anyone know where the issue is?

Content (please ensure you mask any confidential information):

The Adaptive QBE query results in no record showing, and I am only using the id field.
<oj-vb-fragment-param name="query"
value='[[ [{"type": "qbe", "params": [{"key": "KeyContactId", "operator": "$in", "value":[$variables.id] }]}] ]]'>
</oj-vb-fragment-param>

The error is "invalid expression: '$variables.id' - 'id' is not a property of '$variables'"