"This property must be an Array, not an array" Error from AWS Healthlake

Question

I'm converting Apple records data (in DSTU2 format) to R4 format.

This is the data I'm sending to healthlake server

{
  "category": [
    {
      "text": "Vital Signs",
      "coding": [
        {
          "system": "http://hl7.org/fhir/observation-category",
          "code": "vital-signs"
        }
      ]
    }
  ],
  "issued": "2017-03-18T00:00:00Z",
  "status": "final",
  "id": "49a1b0f9-34c2-472d-8b64-34447d307c56",
  "code": {
    "text": "Temperature",
    "coding": [{ "system": "http://loinc.org", "code": "8310-5" }]
  },
  "encounter": { "reference": "Encounter/355" },
  "subject": { "reference": "Patient/82146c45-a7cd-47ee-a5ba-8c588d4c5c9e" },
  "valueQuantity": {
    "code": "Cel",
    "system": "http://unitsofmeasure.org",
    "value": 37.6,
    "unit": "Cel"
  },
  "resourceType": "Observation",
  "meta": { "lastUpdated": "2023-01-30T09:17:54.772Z" }
}

But the healthlake server is giving me the following error

{"resourceType":"OperationOutcome","issue":[{"severity":"error","code":"processing","diagnostics":"This property must be an Array, not an array","location":["Observation.category[0]"]}]}

What does this error means and how to fix this?

PS: I'd only googled the error and could not get any leads

Answer 1

So I ran your query against my Healthlake instance and it worked great. Can you supply more details about the way your Create API call looks like?