Android.support.multidex.MultiDexApplication нельзя преобразовать в имя приложения

Я столкнулся с ошибкой после добавления multidex: android:name = "android.support.multidex.MultiDexApplication" в манифест, и вот мой файл build.gradle:

apply plugin: 'com.android.application'

android {
compileSdkVersion 26
buildToolsVersion '26.0.2'

defaultConfig {
    applicationId "com.projects.realestatefinder"
    minSdkVersion 15
    targetSdkVersion 26
    versionCode 1
    versionName "1.0"
    multiDexEnabled true
    vectorDrawables.useSupportLibrary = true
}
buildTypes {
    release {
        minifyEnabled false
        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        resValue "string", "google_maps_api_key", "AIzaSyBugjavAKmDVOmR0HMhD83Cyru5V0GsCro"
    }
    debug {
        resValue "string", "google_maps_api_key", "AIzaSyBugjavAKmDVOmR0HMhD83Cyru5V0GsCro"
    }
}

packagingOptions {
    exclude 'META-INF/DEPENDENCIES'
    exclude 'META-INF/NOTICE'
    exclude 'META-INF/LICENSE'
    exclude 'META-INF/LICENSE.txt'
    exclude 'META-INF/NOTICE.txt'
}
}

dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
testCompile 'junit:junit:4.12'
compile 'com.android.support:appcompat-v7:26.0.2'
compile 'com.android.support:design:26.0.2'
compile 'com.android.support:multidex:1.0.0'
compile files('libs/apache-mime4j-0.6.jar')
compile files('libs/httpclient-4.3.4.jar')
compile files('libs/httpcore-4.3.2.jar')
compile files('libs/httpmime-4.3.4.jar')
compile files('libs/jackson-annotations-2.2.2.jar')
compile files('libs/jackson-core-2.2.2.jar')
compile files('libs/jackson-databind-2.2.2.jar')
compile files('libs/twitter4j-async-4.0.2.jar')
compile files('libs/twitter4j-core-4.0.2.jar')
compile files('libs/twitter4j-media-support-4.0.2.jar')
compile files('libs/twitter4j-stream-4.0.2.jar')
compile files('libs/universal-image-loader-1.9.2-SNAPSHOT-with-sources.jar')
compile 'com.google.android.gms:play-services-maps:8.4.0'
compile 'com.google.android.gms:play-services-location:8.4.0'
compile 'com.google.android.gms:play-services-ads:8.4.0'
compile 'com.facebook.android:facebook-android-sdk:4.+'
compile 'com.jakewharton:butterknife:8.2.1'
annotationProcessor 'com.jakewharton:butterknife-compiler:8.2.1'
compile 'com.davemorrissey.labs:subsampling-scale-image-view:3.5.0'
compile 'com.squareup.picasso:picasso:2.5.2'
compile 'com.melnykov:floatingactionbutton:1.3.0'
compile 'com.crystal:crystalrangeseekbar:1.1.3'
compile 'com.anthonycr.grant:permissions:1.0'
  }

класс multidex

public class YouApplication extends MultiDexApplication {
@Override
protected void attachBaseContext(Context base) {
    super.attachBaseContext(base);
    MultiDex.install(this);
}

}

Mainfest

xmlns:android = "http://schemas.android.com/apk/res/android"
package = "com.projects.realestatefinder">

<uses-permission android:name = "android.permission.INTERNET" />
<uses-permission android:name = "android.permission.CALL_PHONE" />
<uses-permission android:name = "android.permission.CAMERA" />
<uses-permission android:name = "android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name = "android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name = "android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name = "android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name = "android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name = "android.permission.SEND_SMS" />

<uses-feature android:name = "android.hardware.camera" />
<uses-feature android:name = "android.hardware.telephony" android:required = "false" />

<application
    android:name = "com.projects.realestatefinder.YouApplication"
    android:largeHeap = "true"
    android:allowBackup = "true"
    android:icon = "@mipmap/ic_launcher"
    android:label = "@string/app_name"
    android:supportsRtl = "true"
    android:theme = "@style/AppTheme">
    <activity
        android:name = ".SplashActivity"
        android:theme = "@style/SplashTheme"
        android:label = "@string/app_name">
        <intent-filter>
            <action android:name = "android.intent.action.MAIN" />
            <category android:name = "android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>

    <activity
        android:name = "com.projects.activities.BuiltInActivity"
        android:theme = "@style/AppTheme"
        android:configChanges = "keyboard|keyboardHidden|orientation|screenSize"
        android:label = "@string/built_in"/>

    <activity
        android:name = "com.projects.activities.SettingsActivity"
        android:theme = "@style/AppTheme.SettingsTheme"
        android:configChanges = "keyboard|keyboardHidden|orientation|screenSize"
        android:label = "@string/settings"/>

    <activity
        android:name = "com.projects.activities.ImageViewerActivity"
        android:theme = "@style/AppTheme"
        android:label = "@string/view_image"/>

    <activity
        android:name = "com.projects.activities.AgentListingActivity"
        android:theme = "@style/AppTheme"
        android:label = "@string/agents"/>

    <activity
        android:name = "com.projects.activities.ProfileActivity"
        android:theme = "@style/AppTheme"
        android:configChanges = "keyboard|keyboardHidden|orientation|screenSize"
        android:label = "@string/profile"/>

    <activity
        android:name = "com.projects.activities.PropertyResultActivity"
        android:theme = "@style/AppTheme"
        android:label = "@string/results"/>

    <activity
        android:name = "com.projects.activities.SearchResultActivity"
        android:theme = "@style/AppTheme"
        android:label = "@string/search_results"/>

    <activity
        android:name = "com.projects.activities.RegisterAgentActivity"
        android:theme = "@style/AppTheme"
        android:label = "@string/register_agent"/>

    <activity
        android:name = "com.projects.activities.RegisterActivity"
        android:theme = "@style/AppTheme"
        android:configChanges = "keyboard|keyboardHidden|orientation|screenSize"
        android:label = "@string/register"/>

    <activity
        android:name = "com.projects.activities.RealEstateEditActivity"
        android:theme = "@style/AppTheme"
        android:configChanges = "keyboard|keyboardHidden|orientation|screenSize"
        android:label = "@string/edit_real_estate"/>

    <activity
        android:name = "com.projects.activities.RealEstateAddActivity"
        android:theme = "@style/AppTheme"
        android:configChanges = "keyboard|keyboardHidden|orientation|screenSize"
        android:label = "@string/add_real_estate"/>

    <activity
        android:name = "com.projects.activities.PropertyTypeActivity"
        android:theme = "@style/AppTheme"
        android:label = "@string/property_type"/>

    <activity
        android:name = "com.projects.activities.MyRealEstateActivity"
        android:theme = "@style/AppTheme"
        android:label = "@string/my_real_estates"/>

    <activity
        android:name = "com.projects.activities.MapActivity"
        android:theme = "@style/AppTheme"
        android:label = "@string/map"/>

    <activity
        android:name = "com.projects.activities.SearchActivity"
        android:theme = "@style/AppTheme"
        android:configChanges = "keyboard|keyboardHidden|orientation|screenSize"
        android:label = "@string/search"/>

    <activity
        android:name = "com.projects.activities.AgentDetailActivity"
        android:theme = "@style/AppTheme"
        android:label = "@string/agent_details"/>

    <activity
        android:name = "com.projects.activities.DetailActivity"
        android:theme = "@style/AppTheme"
        android:label = "@string/real_estate_details"/>

    <activity
        android:name = "com.projects.activities.LoginActivity"
        android:theme = "@style/AppTheme"
        android:configChanges = "keyboard|keyboardHidden|orientation|screenSize"
        android:label = "@string/login"/>

    <activity
        android:name = "com.projects.realestatefinder.MainActivity"
        android:theme = "@style/MainTheme"
        android:label = "@string/app_name"/>

    <!--
         The API key for Google Maps-based APIs is defined as a string resource.
         (See the file "res/values/google_maps_api.xml").
         Note that the API key is linked to the encryption key used to sign the APK.
         You need a different API key for each encryption key, including the release key that is used to
         sign the APK for publishing.
         You can define the keys for the debug and release targets in src/debug/ and src/release/.
    -->
    <meta-data
        android:name = "com.google.android.geo.API_KEY"
    android:value = "@string/google_maps_api_key" />

    <meta-data android:name = "com.facebook.sdk.ApplicationId" android:value = "@string/facebook_app_id"/>

</application>

Когда я пытаюсь запустить приложение на android 4.4, оно вылетает. Когда я открываю локацию GPS, я много ищу и не знаю, в чем проблема. Пожалуйста, дайте мне знать, что делать, чтобы решить эту проблему.

Журналы сбоев выглядят следующим образом.

java.lang.ClassCastException: android.support.multidex.MultiDexApplication cannot be cast to com.application.RealEstateApplication
                  at com.projects.fragments.MapFragment.refetch(MapFragment.java:207)
                  at com.projects.fragments.MapFragment.onMapReady(MapFragment.java:200)
                  at com.google.android.gms.maps.SupportMapFragment$zza$1.zza(Unknown Source)
                  at com.google.android.gms.maps.internal.zzo$zza.onTransact(Unknown Source)
                  at android.os.Binder.transact(Binder.java:361)
                  at fs.b(:com.google.android.gms.dynamite_dynamitemodulesb@[email protected] (000306-197041431):20)
                  at com.google.android.gms.maps.internal.bg.a(:com.google.android.gms.dynamite_dynamitemodulesb@[email protected] (000306-197041431):5)
                  at com.google.maps.api.android.lib6.impl.be.run(:com.google.android.gms.dynamite_dynamitemodulesb@[email protected] (000306-197041431):5)
                  at android.os.Handler.handleCallback(Handler.java:733)
                  at android.os.Handler.dispatchMessage(Handler.java:95)
                  at android.os.Looper.loop(Looper.java:136)
                  at android.app.ActivityThread.main(ActivityThread.java:5476)
                  at java.lang.reflect.Method.invokeNative(Native Method)
                  at java.lang.reflect.Method.invoke(Method.java:515)
                  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1283)
                  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1099)
                  at dalvik.system.NativeStart.main(Native Method)