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WPN_E_INVALID_HTTP_STATUS_CODE
WPN_E_INVALID_HTTP_STATUS_CODE is an HRESULT used by the Windows notification platform. It means that a polling request used by the notification platform received a non-success HTTP response.
What to check for WPN_E_INVALID_HTTP_STATUS_CODE
- Record the response status, safe response headers, endpoint URL, and correlation information.
- Check authentication, redirects, authorization, rate limits, and server errors at the polling endpoint.
- Handle non-2xx results explicitly instead of parsing the body as a successful notification response.
Diagnostic discriminator: Confirm that channel acquisition reached the push service and inspect the returned HTTP status. This result is about a non-success server response, not local notification settings or payload validation.
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