In this post, you’ll learn more about the Error APPX_E_MISSING_REQUIRED_FILE – 0x80080203 that is returned when working with the COM-based APIs in Win32
Win32 COM Error
APPX_E_MISSING_REQUIRED_FILE – 0x80080203
Win32 COM Error Error Description
The file is not a valid package because it is missing a manifest or block map, or missing a signature file when the code integrity file is present.