[Android Studio] Previewが表示されない

AndroidStudioのレイアウト編集画面でClassNotFound Exception が発生してプレビューが見れません。コンパイルは通りますが、なぜかプレビューが見れません、なぜでしょうか？
どなたか、よろしくお願いします。

エラーメッセージ

The following classes could not be instantiated:
- android.support.design.widget.CoordinatorLayout (Open Class, Show Exception, Clear Cache)
- android.support.design.bottomappbar.BottomAppBar (Open Class, Show Exception, Clear Cache)

##　ログ

java.lang.ClassNotFoundException: android.view.View$OnUnhandledKeyEventListener
	at org.jetbrains.android.uipreview.ModuleClassLoader.load(ModuleClassLoader.java:180)
	at com.android.tools.idea.rendering.RenderClassLoader.findClass(RenderClassLoader.java:61)
	at org.jetbrains.android.uipreview.ModuleClassLoader.findClass(ModuleClassLoader.java:118)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
	at org.jetbrains.android.uipreview.ModuleClassLoader.loadClass(ModuleClassLoader.java:213)
	at android.support.design.widget.CoordinatorLayout.setupForInsets(CoordinatorLayout.java:3213)
	at android.support.design.widget.CoordinatorLayout.<init>(CoordinatorLayout.java:226)
	at android.support.design.widget.CoordinatorLayout.<init>(CoordinatorLayout.java:201)
	at sun.reflect.GeneratedConstructorAccessor866.newInstance(Unknown Source)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
	at org.jetbrains.android.uipreview.ViewLoader.createNewInstance(ViewLoader.java:481)
	at org.jetbrains.android.uipreview.ViewLoader.loadClass(ViewLoader.java:264)
	at org.jetbrains.android.uipreview.ViewLoader.loadView(ViewLoader.java:222)
	at com.android.tools.idea.rendering.LayoutlibCallbackImpl.loadView(LayoutlibCallbackImpl.java:209)
	at android.view.BridgeInflater.loadCustomView(BridgeInflater.java:337)
	at android.view.BridgeInflater.loadCustomView(BridgeInflater.java:348)
	at android.view.BridgeInflater.createViewFromTag(BridgeInflater.java:248)
	at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:730)
	at android.view.LayoutInflater.inflate(LayoutInflater.java:492)
	at android.view.LayoutInflater.inflate(LayoutInflater.java:394)
	at com.android.layoutlib.bridge.impl.RenderSessionImpl.inflate(RenderSessionImpl.java:325)
	at com.android.layoutlib.bridge.Bridge.createSession(Bridge.java:384)
	at com.android.tools.idea.layoutlib.LayoutLibrary.createSession(LayoutLibrary.java:193)
	at com.android.tools.idea.rendering.RenderTask.createRenderSession(RenderTask.java:544)
	at com.android.tools.idea.rendering.RenderTask.lambda$inflate$3(RenderTask.java:678)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)

home_activity.xml

xml
1<?xml version="1.0" encoding="utf-8"?>
2<android.support.design.widget.CoordinatorLayout
3    xmlns:android="http://schemas.android.com/apk/res/android"
4    xmlns:app="http://schemas.android.com/apk/res-auto"
5    xmlns:tools="http://schemas.android.com/tools"
6    android:layout_width="match_parent"
7    android:layout_height="match_parent"
8    tools:context=".HomeActivity">
9
10    <android.support.design.bottomappbar.BottomAppBar
11        android:id="@+id/appbar"
12        android:layout_width="match_parent"
13        android:layout_height="wrap_content"
14        android:layout_gravity="bottom"
15        app:backgroundTint="@color/colorPrimary"
16        app:fabAlignmentMode="center" />
17
18    <android.support.design.widget.FloatingActionButton
19        android:id="@+id/fab"
20        android:layout_width="wrap_content"
21        android:layout_height="wrap_content"
22        app:layout_anchor="@id/appbar"/>
23
24</android.support.design.widget.CoordinatorLayout>

build.gradle (app)

apply plugin: 'com.android.application'

apply plugin: 'kotlin-android'

apply plugin: 'kotlin-android-extensions'

android {
    compileSdkVersion 28
    defaultConfig {
        applicationId "xxx.xxx.xxx"
        minSdkVersion 19
        targetSdkVersion 28
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation"org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
    implementation 'com.android.support:design:28.0.0'
    implementation 'com.android.support:appcompat-v7:28.0.0'
    implementation 'com.android.support.constraint:constraint-layout:1.1.3'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.2'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
}