title: Failed to load AppCompat ActionBar with unknown error.Android Studio 3.1.3
body: <p>This was my first time using Android studio and I dont know what are those errors mean or what they implyenter image description here</p>
  
  <blockquote>
    <p>[Render Problem
    Failed to load AppCompat ActionBar with unknown error.
    Missing Constraints in ConstraintLayout</p>
    
    <p>This view is not constrained. It only has designtime positions, so it will jump to (0,0) at runtime unless you add the constraints  The layout editor allows you to place widgets anywhere on the canvas, and it records the current position with designtime attributes (such as layout_editor_absoluteX). These attributes are not applied at runtime, so if you push your layout on a device, the widgets may appear in a different location than shown in the editor. To fix this, make sure a widget has both horizontal and vertical constraints by dragging from the edge connections.]  </p>
  </blockquote>
  
  <p><a href="https://i.stack.imgur.com/aGl3v.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/aGl3v.png" alt="Render Problem"></a></p>
  
  <p><a href="https://i.stack.imgur.com/PRA2n.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/PRA2n.png" alt="Gradle Project"></a></p>
  
  <p><a href="https://i.stack.imgur.com/GKdY9.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/GKdY9.png" alt="enter image description here"></a></p>
  
  <p><a href="https://i.stack.imgur.com/lzLKG.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/lzLKG.png" alt="enter image description here"></a></p>