Facing issue while defining service connection querying on child resource

Summary:

Facing issue while defining service connection querying on child resource

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I am trying to invoke Workers Rest api querying on a child resource (assignment) . The REST API call works fine in Postman and returns expected results, however while trying to test a service connection in Visual Builder Studio with same parameter, it doesn't work. Have included REST-Framework-Version-4 in header section

Am I missing something here ?

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