The certificate is due about ipasim

[Jimmy2004]

Powershell says that it cannot be installed because of the *.cer file has some issues.

[jjonescz]

This is just a development certificate, you can renew it yourself (see Create a certificate for package signing) and re-sign the app package (see Sign an app package using SignTool).

I have updated the latest release to include the renewed certificate.

Alternatively, you can follow these steps to renew the certificate yourself:

1. Download your chosen release, i.e., ipasim-build-v*.zip.
2. Extract it and navigate to folder with the package (.msix file).
3. Open elevated PowerShell in that folder.
4. Replace path to signtool depending on your installed Windows SDK in the following script (3rd line) and then execute it:

   $cert = New-SelfSignedCertificate -Type Custom -Subject "CN=jjone" -KeyUsage DigitalSignature -FriendlyName "ipaSim" -CertStore Cert:\CurrentUser\My\ -TextExtension @("2.5.29.37={text}1.3.6.1.5.5.7.3.3", "2.5.29.19={text}")
   Export-PfxCertificate -cert $cert -FilePath key.pfx -Password $(ConvertTo-SecureString -String "ipaSim" -Force -AsPlainText)
   & 'C:\Program Files (x86)\Windows Kits\10\bin\10.0.18362.0\x64\signtool.exe' sign /fd sha256 /a /f key.pfx /p ipaSim .\IpaSimApp_*.msix
   Remove-Item key.pfx
   Export-Certificate -Cert $cert -FilePath (Get-ChildItem .\IpaSimApp_*.cer).name
   Remove-Item $cert.PSPath

5. The certificate (.cer file) should be renewed and the app package (.msix file) signed. You can now install the app by executing ./Add-AppDevPackage.ps1 as usual.