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web-to-app linking with app URI handlers deployment error

Hi everyone,

I'm trying to achieve web-to-app linking for my HoloLens App so that when I click on certain URI in the browser, my App will be automatically launched/activated. I'm trying to follow this document:
https://msdn.microsoft.com/en-us/windows/uwp/launch-resume/web-to-app-linking
Which is not so clear on the appxmanifest modification part to begin with, so I found a more specific link:
https://msdn.microsoft.com/en-us/library/windows/apps/mt670670.aspx
Which has a more detailed example regarding where to add the Extensions. I added the part stated in the first document successfully without build error (previously when I added it to the wrong location, there's always some error).

The current Package.appxmanifest looks like this:

When I try to deploy it to my HoloLens, I get the following error:

DEP0700 : Registration of the app failed. error 0xC00CE014: App manifest validation error: The app manifest must be valid as per schema: Line 35, Column 10, Note: The schema for OSMinVersion specified does not recognize XML fields with namespace "http://schemas.microsoft.com/appx/manifest/uap/windows10/3". Please ensure that you have the correct OSMinVersion specified. Reason: Element '{http://schemas.microsoft.com/appx/manifest/uap/windows10/3}Extension' is unexpected according to content model of parent element '{http://schemas.microsoft.com/appx/manifest/foundation/windows10}Extensions'.Expecting: {http://schemas.microsoft.com/appx/manifest/foundation/windows10}ApplicationExtensionChoice. (0x80080204)

Anyone can help me out? Thanks a lot in advance!

Best,

Qun

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