Visual Studio 2015 CTP 6 Windows 10 Projects Designer's Load Failed

Question

I am trying to develop Windows 10 Project with VS2015 CTP6 on Windows 10 Technical Preview. I can't use designer because of this error. How can I solve this?

Thanks.

Answer 1

Make sure you have last build of Windows 10. I had the same problem with build 9xxxx and solved the issue by installing build 10041. Also Here explains that problem can be solved by updating windows (without installing a new build).

Error message is: Deployment Register opteration with target failed with error (0x80073CFD) ERROR_INSTALL_PREREQUISITE_FAILED

Answer 2

This could be due to the latest Windows 10 build in the Fast ring, build 10049. It seems to break some things for the developers.

There are 2 issues using Visual Studio 2015 preview on this build:The emulators will not boot and you won’t be able to deploy a Windows Universal app to the Mobile emulator. The XAML designer in VS and Blend will crash when opened.

If you are a developer using these tools today to develop Windows Universal apps and need this functionality to work – we recommend switching to the Slow ring until we release a patch to fix these issues.

Source: http://blogs.windows.com/bloggingwindows/2015/03/30/windows-10-technical-preview-build-10049-now-available/

Answer 3

I ran into this today also. The solution is here:

https://msdn.microsoft.com/library/windows/apps/xaml/dn706236.aspx

Short answer: enabling developer mode has changed, but the new route is currently broken and requires manually enabling 2 group policies using gpedit.msc. The designer needs these policies in order to activate itself.

Under "Local Computer Policy > Computer Configuration > Administrative Templates > Windows Components > App Package Deployment", enable:

• Allow all trusted apps to install (Enables your device for sideloading apps)
• Allow development of Windows Store applications and installing them directly from an IDE (Enables your device for development from Visual Studio)

Then reboot.