Unable to sideload UWP app from app package

Question

I am trying to side load an app that I developed on the same computer. I am following these instructions: https://msdn.microsoft.com/en-us/library/hh454036.aspx . It says that when a package is created there should be the following folders:

C:\Projects\MyApp\MyApp\AppPackages\MyApp_1.0.2.0_x64 C:\Projects\MyApp\MyApp\AppPackages\MyApp_1.0.2.0_x64_Test

But only the test folder is created. When the Add-AppDevPackage.ps1 file is Run with PowerShell, there is the following error:

Installing app...

Found dependency package(s):

C:\Users\Name\Documents\Visual Studio 2015\Projects\Dtapp\Dtapp\AppPackages\Dtapp_1.0.0.0_Debug_Test\Dependencies\x86\Microsoft.NET.CoreRuntime.1.0.appx

C:\Users\Name\Documents\Visual Studio 2015\Projects\Dtapp\Dtapp\AppPackages\Dtapp_1.0.0.0_Debug_Test\Dependencies\x86\Microsoft.VCLibs.x86.Debug.14.00.appx

C:\Users\Name\Documents\Visual Studio 2015\Projects\Dtapp\Dtapp\AppPackages\Dtapp_1.0.0.0_Debug_Test\Dependencies\x64\Microsoft.NET.CoreRuntime.1.0.appx

C:\Users\Name\Documents\Visual Studio 2015\Projects\Dtapp\Dtapp\AppPackages\Dtapp_1.0.0.0_Debug_Test\Dependencies\x64\Microsoft.VCLibs.x64.Debug.14.00.appx

Add-AppxPackage : Deployment failed with HRESULT: 0x80073CF9, Install failed.

Please contact your software vendor.

Unspecified error

Thank you.

Answer 1

I had the same problem and was able to sideload the app after uninstalling it from the start menu/all apps.

Answer 2

Try to check are folders C:\Windows\AUInstallAgent and C:\Windows\AppReadiness present in your system. If not, create a blank folders and reboot your PC.
That's the usual solution for 0x80073CF9 error