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BR_Red_Panda's avatar
BR_Red_Panda
Copper Contributor
Jun 10, 2022
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Attempting to install a created App Package fails with error code 0x8000FFFF among other issues.

After creating an App Package from a WinUI 3 project, attempting to install it using the created .msix file results in the error code: 0x8000FFFF. Installing the application using "Install.ps1" and e...
C Sharp
WinUI
  • Roy_MacLachlan's avatar
    Roy_MacLachlan
    Jul 13, 2022

    Hi BR_Red_Panda,

    My initial thoughts on this, is that there is an issue with the certificate used to sign the app. But as you've confirmed, the Certificate has been installed on the system. I'd also like to confirm that it is installed in the Trusted People certificate store?

    If it is, please submit a feedback hub submission by pressing [Windows Key]+[F], recording your install experience and then after submitting it, please share with me in this post, or in direct messaging information about the feedback item.

BR_Red_Panda's avatar
BR_Red_Panda
Copper Contributor
Jun 23, 2022

Roy_MacLachlan, Yes, I created and installed a certificate as part of the packaging process.

Roy_MacLachlan's avatar
Roy_MacLachlan
Icon for Microsoft rankMicrosoft
Jul 13, 2022

Hi BR_Red_Panda,

My initial thoughts on this, is that there is an issue with the certificate used to sign the app. But as you've confirmed, the Certificate has been installed on the system. I'd also like to confirm that it is installed in the Trusted People certificate store?

If it is, please submit a feedback hub submission by pressing [Windows Key]+[F], recording your install experience and then after submitting it, please share with me in this post, or in direct messaging information about the feedback item.

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