title: can't debug application in android studio
body: <p>the ADB file was erased by avast antivirus. I Downloaded platform-tools from official android site  extract it and paste it in the SDK folder
  now i can see emulators but i have problems with debugging   </p>
  
  <p>the error message is</p>
  
  <pre><code>3:35 PM 'cmd package install-create -r -t  -S 11679368' returns error 'Unknown failure: cmd: Can't find service: package'
  
  3:35 PM Session 'app': Install failed.
                  Installation failed
                  Rerun
  </code></pre>
  
  <p>i'm using android studio 3.4.1</p>