Я использую Android Studio 3.1.3, и у меня есть ошибки

в моей студии Android 3.1.3, пока он покажет следующие ошибки

Не удалось найти стиль "ordinatorLayoutStyle "в текущей теме.

Кнопка

**This view is not constrained. It only has design-time positions, so it will jump to (0,0) at runtime unless you add the constraints.**

и окно дизайна всегда пусто

и загрузка займет много времени

какие-либо предложения...?

вот изображение

content_main.xml

    <?xml version = "1.0" encoding = "utf-8"?>
    <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"
    app:layout_behavior = "@string/appbar_scrolling_view_behavior"
    tools:context = ".MainActivity"
   tools:showIn = "@layout/activity_main">
   <TextView
    android:layout_width = "wrap_content"
    android:layout_height = "wrap_content"
    android:text = "Hello World!"
    app:layout_constraintBottom_toBottomOf = "parent"
    app:layout_constraintLeft_toLeftOf = "parent"
    app:layout_constraintRight_toRightOf = "parent"
    app:layout_constraintTop_toTopOf = "parent" />
  </android.support.constraint.ConstraintLayout>

Style.xml

<resources>

<!-- Base application theme. -->
<style name = "AppTheme" parent = "Theme.AppCompat.Light.DarkActionBar">
    <!-- Customize your theme here. -->
    <item name = "colorPrimary">@color/colorPrimary</item>
    <item name = "colorPrimaryDark">@color/colorPrimaryDark</item>
    <item name = "colorAccent">@color/colorAccent</item>
</style>

<style name = "AppTheme.NoActionBar">
    <item name = "windowActionBar">false</item>
    <item name = "windowNoTitle">true</item>
</style>

<style name = "AppTheme.AppBarOverlay" parent = "ThemeOverlay.AppCompat.Dark.ActionBar" />

<style name = "AppTheme.PopupOverlay" parent = "ThemeOverlay.AppCompat.Light" />