title: How to solve "Element project must be declared" issue in Android Studio?
body: <p>I usually run my apps without any kind of problems. But, recently, I faced this problem in colors.xml : "Element project must be declared"..... How can I solve it??? </p>
  
  <p><a href="https://i.stack.imgur.com/LDeOi.jpg" rel="nofollow noreferrer">oi</a></p>