title: Refactor Button is Grayed Out in Android Studio
body: <p>My android studion was working fine. But suddenly I can't refactor any of my projects. When I got to the Refactor->rename then the Button Grayed.</p>
  
  <p><a href="https://i.stack.imgur.com/yojSm.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/yojSm.png" alt="enter image description here"></a> </p>
  
  <p>I tried re-installing android studio but did not work. Then I updated it to the latest version (From 173.4720617 to Build# AI-173.4819257) but got the same problem. </p>
  
  <p>Even I tried to refactor different projects on another pc but got the same problem.</p>
  
  <p>I don't know how this problem is generated within a night to all of my pc's.</p>
  
  <p>Please help me solving this problem</p>