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I'm trying use Vungle to add Video for my app. enter link description here

But i have 2 bug below: 1: Error 1 Cannot await 'Windows.Foundation.IAsyncOperation1<string>' [2]:Error 2 The type 'Windows.Foundation.IAsyncOperation1' is defined in an assembly that is not referenced. You must add a reference to assembly 'Windows.Foundation.FoundationContract, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null, ContentType=WindowsRuntime'.

Anyone know, what thing i must do to fix that bug !

Nguyễn Hoàng
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The reason this isn't working is that Vungle's Windows SDK doesn't currently support 8.1 (Only Windows 10). This should be available by mid-December though.

Dana Kock
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