Xamarin Android Designer Not Working -

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my android designer isn't working in vs2015. have installed latest updates isn't working still. i'm getting error message in following picture:

enter image description here

can me?

sdk manager can ran manually from: "c:\program files (x86)\android\android-sdk\sdk manager.exe"

please check have installed proper sdk - you'll need 1 of latest - 25 , 1 of need (like 17 or so)


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