curl -v -H "accept: application/fhir+xml" -X GET "http://fhirserver/Account/?_id=Account-Read-Example" 

{
  "locationCol": 1155,
  "severity": "INFORMATION",
  "locationString": "Bundle.entry[0].resource/*Account/Account-Read-Example*/.coverage[0].extension[0]",
  "messageId": "Extension_EXT_Unknown",
  "locationLine": 2,
  "message": "Unknown extension http://fhir.de/StructureDefinition/ExtensionAbrechnungsart"
}

{
  "locationCol": 264,
  "severity": "WARNING",
  "locationString": "Bundle.entry[0].resource/*Account/Account-Read-Example*/.meta.profile[0]",
  "messageId": "Validation_VAL_Profile_Unknown",
  "locationLine": 2,
  "message": "Profile reference 'https://gematik.de/fhir/isik/StructureDefinition/ISiKAbrechnungsfall' has not been checked because it is unknown"
}

{
  "severity": "WARNING",
  "messageId": "REFV_WARN_PASSED_PROFILE_DIFFERS_FROM_META_PROFILE",
  "message": "Resource meta.profile differs from the passed profile for validation: meta.profile=[]; passed=https://hl7.org/fhir/StructureDefinition/Bundle"
}

{"empty": false}