title: Failed to load AppCompat ActionBar with unknown error
body: <p>My project can't render the layout in preview. My Android Studio version 3.1.2.
  Im using API 28. This my <strong>activity_main.xml</strong></p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;android.support.constraint.ConstraintLayout 
  xmlns:android="http://schemas.android.com/apk/res/android"
  xmlns:app="http://schemas.android.com/apk/res-auto"
  xmlns:tools="http://schemas.android.com/tools"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  tools:context=".MainActivity"
  android:id="@+id/frame_container"&gt;
  
  &lt;TextView
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:text="Hello World"
      android:gravity="center"/&gt;
  &lt;/android.support.constraint.ConstraintLayout&gt;
  </code></pre>
  
  <p>It's simple, just to print <strong>Hello World</strong> to layout, but it can't show. The error like below :
  <a href="https://i.stack.imgur.com/gg9zT.png" rel="noreferrer"><img src="https://i.stack.imgur.com/gg9zT.png" alt="Preview error"></a></p>
  
  <p>I search the solve problem, the solution is using API 26. And i try, everything is normal, preview success. But i create <strong>Fragment Activity</strong>, the problems come back, preview can't show.
  <em>If you have new solution, please help me!</em></p>