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WPN_E_INVALID_APP
WPN_E_INVALID_APP is an HRESULT used by the Windows notification platform. It means that the supplied application identifier is not valid for the calling packaged application or notification API.
What to check for WPN_E_INVALID_APP
- Verify the app identifier against the installed package manifest and current package identity.
- For multi-app packages, confirm that the specified app belongs to the same package as the caller.
- Avoid deriving the identifier from display names, paths, or unvalidated configuration text.
Diagnostic discriminator: Verify the installed package identity and the app identifier passed to the notification API. If the identifier does not resolve to the intended package, channel or cloud diagnostics are secondary.
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