title: All Packages are not available for download Android studio 3.1.2
body: <p>Install all packages for Android P, after that create new project with Kotlin support and facing the error <strong>Failed to find target with hash string 'android-28'</strong></p>
  
  <p><a href="https://i.stack.imgur.com/6Z06f.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/6Z06f.png" alt="enter image description here"></a></p>
  
  <p><a href="https://i.stack.imgur.com/wmA3s.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/wmA3s.png" alt="enter image description here"></a></p>
  
  <p><a href="https://i.stack.imgur.com/rWOfK.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/rWOfK.png" alt="enter image description here"></a></p>
  
  <p><a href="https://i.stack.imgur.com/rWOfK.png" rel="nofollow noreferrer">enter image description here</a>
  Action Performed:</p>
  
  <p>1- Clean/Rebuild Project</p>
  
  <p>2- Proxy is working fine in setting and gradle.properties file</p>
  
  <p>3- Invalidate Caches/Restart </p>