title: Getting "Error: Missing Constraints in ConstraintLayout"
body: <p>I am using Android Studio 3.0.1. Whenever I drag button or do any other activity on my Activity Screen it gives me the following error </p>
  
  <blockquote>
    <p>Missing Constraints in ConstraintLayout" </p>
  </blockquote>
  
  <p><a href="https://i.stack.imgur.com/0W8X5.jpg" rel="noreferrer"><img src="https://i.stack.imgur.com/0W8X5.jpg" alt="enter image description here"></a></p>
  
  <p>I need a permanent fix for this issue. Please help me. </p>