I saw your post - not certain we have the same problem. I have a PFX key generated from VS along with the package name from the store.
When I compile the UWP module I get:
Code:
Package creation succeeded.
C:\WINDOWS\system32\cmd.exe DONE (0)
C:\WINDOWS\system32\cmd.exe /c ""C:/Program Files (x86)/Windows Kits/10/bin/x86\signtool.exe" sign /a /v /fd SHA256 /f "C:\ProgramData/GameMakerStudio2/Cache/runtimes\runtime-2.0.6.93\WindowsUAP\WinUWPRunner_TemporaryKey.pfx" "D:\GameMaker BubblePop\Version 2\LetsPop_1.0.0.0\LetsPop.appx""
The following certificate was selected:
Issued to: Sandbox
Issued by: Sandbox
Expires: Thu Dec 30 18:00:00 2100
SHA1 hash: C87C1BB80B2048BBDAA8A331A20F32402109B863
Done Adding Additional Store
Successfully signed: D:\GameMaker BubblePop\Version 2\LetsPop_1.0.0.0\LetsPop.appx
Number of files successfully Signed: 1
Number of warnings: 0
Number of errors: 0
C:\WINDOWS\system32\cmd.exe DONE (0)
Igor complete.
elapsed time 00:00:04.9150948s for command "C:\ProgramData/GameMakerStudio2/Cache/runtimes\runtime-2.0.6.93/bin/Igor.exe" -options="C:\Users\Mark\AppData\Local\GameMakerStudio2\build.bff" -- WinUWP Package started at 05/17/2017 23:49:21
SUCCESS : Package Program Complete
The app installs on machine where I generate the app (and where GM2 is installed). My problem is when I try to install the app on a Surface Pro - it fails with a certificate error. This might very well by my problem/error, just can't figure it out. I have the Surface Pro in development mode on Windows 10.
I am using a Windows 10 desktop for development.