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ERROR_INVALID_STAGED_SIGNATURE
Loose or staged package content does not satisfy signature rules
ERROR_INVALID_STAGED_SIGNATURE is especially relevant to development registration from an unpacked layout. If AppxSignature.p7x and AppxBlockMap.xml are present, they must form valid package integrity metadata; otherwise a development-mode loose registration should not contain misleading stale signing artifacts.
Rebuild the package or deployment layout from clean outputs. Verify that the certificate publisher matches the manifest and that the signing hash algorithm matches the block map. Do not copy a signature from another build after changing files. For loose development registration, follow the supported tooling so signature and block-map files are either regenerated consistently or omitted as allowed.
What to inspect
- Compare manifest publisher, certificate subject, and package signature.
- Remove stale build artifacts before staging or registering.
- Use SignTool or Visual Studio packaging rather than copying signatures.
References
- Microsoft: signing MSIX and AppX packages
- Microsoft: block-map and signature integrity
- Microsoft: registering a staged or loose package
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