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unsupported_report_channel

422 Unprocessable Content   Reports cannot be delivered to a contact of this type.

When you get it

Reports cannot be delivered to a contact of this type. It is always answered with HTTP 422 - one code means one status, so a client may key its handling on either.

Fields it carries

Inside each errors[] entry, beside pointer:

contactType

The contact type this problem is about.

supported

The values this endpoint supports.

A field is omitted when the server genuinely does not know it - an absent member is never the same as an empty one.

How to fix it

The request was well-formed but a value is not acceptable. The fields above name the offending value and what would be accepted - fix the request and retry.

Shape

{
  "type":   "https://api2.host-tracker.com/problems/unsupported-report-channel",
  "title":  "Reports cannot be delivered to a contact of this type.",
  "status": 422,
  "code":   "unsupported_report_channel",
  "errors": [
    { "contactType": …, "supported": … }
  ]
}