Unable to install extensions - VS 2019 RRS feed

  • Question

  • I recently installed VS 2019 Community on my D: drive.   When I try to install an extension, I get dialog saying that the installation failed and referencing a log, which contains the following:

    11/1/2019 9:03:45 AM - Microsoft VSIX Installer
    11/1/2019 9:03:45 AM - -------------------------------------------
    11/1/2019 9:03:45 AM - vsixinstaller.exe version:
    11/1/2019 9:03:45 AM - 16.4.25
    11/1/2019 9:03:45 AM - -------------------------------------------
    11/1/2019 9:03:45 AM - Command line parameters:
    11/1/2019 9:03:45 AM - C:\program files (x86)\microsoft visual studio\installer\resources\app\ServiceHub\Services\Microsoft.VisualStudio.Setup.Service\vsixinstaller.exe,/appidinstallpath:D:\Program Files (x86)\Microsoft Visual Studio\2019\Community\Common7\IDE\devenv.exe,/skuName:Community,/skuVersion:16.3.29424.173,/appidname:Microsoft Visual Studio Community 2019,/culture:en-US,/noep,C:\Users\chjohnson.CALATLCORP\AppData\Local\Temp\VSIXhlxaxiov.vsix,C:\Users\chjohnson.CALATLCORP\AppData\Local\Temp\VSIX1jewbtaz.vsix,C:\Users\chjohnson.CALATLCORP\AppData\Local\Temp\VSIXykmortyi.vsix,C:\Users\chjohnson.CALATLCORP\AppData\Local\Temp\VSIXvs4hw2sa.vsix,C:\Users\chjohnson.CALATLCORP\AppData\Local\Temp\VSIXpo2pc0a0.vsix,C:\Users\chjohnson.CALATLCORP\AppData\Local\Temp\VSIXbcbx2q3m.vsix,C:\Users\chjohnson.CALATLCORP\AppData\Local\Temp\VSIXu0qsmhhy.vsix,C:\Users\chjohnson.CALATLCORP\AppData\Local\Temp\VSIXojgpaq3h.vsix,C:\Users\chjohnson.CALATLCORP\AppData\Local\Temp\VSIXgvcyp2ea.vsix,C:\Users\chjohnson.CALATLCORP\AppData\Local\Temp\VSIXp0kjkxbz.vsix,C:\Users\chjohnson.CALATLCORP\AppData\Local\Temp\VSIX1x5qsxbd.vsix,C:\Users\chjohnson.CALATLCORP\AppData\Local\Temp\VSIXebrh2n2t.vsix
    11/1/2019 9:03:45 AM - -------------------------------------------
    11/1/2019 9:03:45 AM - Microsoft VSIX Installer
    11/1/2019 9:03:45 AM - -------------------------------------------
    11/1/2019 9:03:47 AM - System.NullReferenceException: Object reference not set to an instance of an object.
       at Microsoft.VisualStudio.Setup.Cache.Instance.get_SupportsExtensions()
       at VSIXInstaller.SetupExtensions.GetLaunchableInstances(IQuery query)
       at VSIXInstaller.SupportedSKUs.EnumerateIsolatedInstalls(Action`1 callback)
       at VSIXInstaller.SupportedSKUs.AddInstalledLocationBasedSKUs(IntPtr userToken)
       at VSIXInstaller.SupportedSKUs.InitializeSupportedSKUs(IntPtr userToken)
       at VSIXInstaller.ExtensionService.InitializeSupportedSKUs(ICommandLineData cmdLineData, IntPtr duplicatedUserToken)
       at VSIXInstaller.App.Initialize(Boolean isRepairSupported)
       at VSIXInstaller.App.Initialize()
       at System.Threading.Tasks.Task`1.InnerInvoke()
       at System.Threading.Tasks.Task.Execute()
    --- End of stack trace from previous location where exception was thrown ---
       at Microsoft.VisualStudio.Telemetry.WindowsErrorReporting.WatsonReport.GetClrWatsonExceptionInfo(Exception exceptionObject)

    Friday, November 1, 2019 1:29 PM

All replies

  • Hi cjohnson1440,

    Welcome to MSDN forum.

    Did you install Extension from Visual Studio -> Extensions -> Manage Extensions?

    After checking the log file you shared I suggest you could try below steps to troubleshoot.

    #1. Repair Visual Studio from Visual Studio Installer -> find VS 2019 -> More -> Repair.

    #2. Try to install in safemode. (open developer Command Prompt for VS 2019 -> type devenv /safemode to start VS in safe mode)

    #3. Try to reset settings. (open developer Command Prompt for VS 2019 -> type devenv /resetsettings)

    #4. Try to manually uninstall and re-install this extension. (Extensions -> Manage Extensions)

    If this issue persists, I need your help to collect the setup log and for further research. Please download and run this collect.exe tool, go to %temp% folder and find the vslog.zip file, upload it to https://onedrive.live.com/ and share the link here.

    Hope all above could help you and any feedback will be expected.

    Best Regards,


    MSDN Community Support
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    Monday, November 4, 2019 9:24 AM