platform exec: Cannot install appx package exit status 0xffffffff Add-AppxPackage : Deployment failed with HRESULT: 0x800B010A, A certificate chain could not be built to a trusted root authority. error 0x800B010A: The root certificate and all intermediate certificates of the signature in the app package or bundle must be trusted. NOTE: For additional information, look for [ActivityId] 5ec4a8f1-ad9d-0001-bec0-c45e9dadd901 in the Event Log or use the command line Get-AppxLog -ActivityID 5ec4a8f1-ad9d-0001-bec0-c45e9dadd901 At line:1 char:65 + ... AppData\Local\Temp\Webex-x64.appx";Add-AppxPackage $appx_file;if( -no ... + ~~~~~~~~~~~~~~~~~~~~~~~~~~ + CategoryInfo : NotSpecified: (C:\Users\Admin\...\Webex-x64.appx:String) [Add-AppxPackage], Exception + FullyQualifiedErrorId : DeploymentError,Microsoft.Windows.Appx.PackageManager.Commands.AddAppxPackageCommand