Unable to run the android app in Visual Studio 2015 / Xamarin / Genymotion [Solved]

Описание: Trying to run a android project in VS2015 in a simulator and got this in the output ? I will show you in this video how to solve this

A numeric comparison was attempted on "$(_DeviceSdkVersion)" that evaluates to "" instead of a number, in condition "$(_DeviceSdkVersion) 21".