I\'m trying to sign a Windows 8 appx package with a pfx file I have. I\'m using a command like so:
signtool.exe sign /fd sha256 /f \"key.pfx\" \"app.appx\"
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I got the same problem in my console application development and as a quick workaround,
go to project properties
then,
click on signing
tab and uncheck "Sign the ClickOnce Manifest".
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FYI You can also see this less one minute video solution. The above picture is taken form the video.