title: Xamarin Issue: The project App1 is missing Android SDKs
body: <p>The project App1 is missing Android SDKs required for building. Double-click on this message and follow the prompts to install them.</p>
  
  <p>I clicked on pop up bar, but didn't work anything. </p>
  
  <p>What I am missing here?</p>
  
  <p><a href="https://i.stack.imgur.com/GiE16.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/GiE16.png" alt="SDK is missing"></a></p>
  
  <p><a href="https://i.stack.imgur.com/eecOY.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/eecOY.png" alt="SDKs are already installed"></a></p>
  
  <p><a href="https://i.stack.imgur.com/yAVJN.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/yAVJN.png" alt="NDK and other library files are installed"></a></p>
  
  <p><a href="https://i.stack.imgur.com/7dcSQ.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/7dcSQ.png" alt="Correct directory for Misc. files for Xamarin"></a></p>