OneSignal Android Studio Unknown error getting FCM Token

i have a problem. I cannot use OneSignal. I don't know why. I googled the error but nothing helped.

Currently i use Android Studio on Version: 4.2 The newest OneSignal Version: 4.3.4 And also the newest Firebase Version. I created a new Firebase Project and OneSignal Project.

This is the Error:

2021-05-25 13:06:37.370 3225-4181/de.kggaming.application E/OneSignal: Unknown error getting FCM Token
    java.lang.NoClassDefFoundError: Failed resolution of: Lcom/google/firebase/iid/FirebaseInstanceId;
        at com.onesignal.PushRegistratorFCM.getToken(PushRegistratorFCM.java:60)
        at com.onesignal.PushRegistratorAbstractGoogle.attemptRegistration(PushRegistratorAbstractGoogle.java:97)
        at com.onesignal.PushRegistratorAbstractGoogle.access$100(PushRegistratorAbstractGoogle.java:37)
        at com.onesignal.PushRegistratorAbstractGoogle$1.run(PushRegistratorAbstractGoogle.java:84)
        at java.lang.Thread.run(Thread.java:923)
     Caused by: java.lang.ClassNotFoundException: Didn't find class "com.google.firebase.iid.FirebaseInstanceId" on path: DexPathList[[dex file "/data/data/de.kggaming.application/code_cache/.overlay/base.apk/classes3.dex", zip file "/data/app/~~37wP-zifceloViDoIaZiLQ==/de.kggaming.application-MT0rnPML9HHvlPgijekxXw==/base.apk"],nativeLibraryDirectories=[/data/app/~~37wP-zifceloViDoIaZiLQ==/de.kggaming.application-MT0rnPML9HHvlPgijekxXw==/lib/arm64, /system/lib64]]
        at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:207)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:379)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
        at com.onesignal.PushRegistratorFCM.getToken(PushRegistratorFCM.java:60) 
        at com.onesignal.PushRegistratorAbstractGoogle.attemptRegistration(PushRegistratorAbstractGoogle.java:97) 
        at com.onesignal.PushRegistratorAbstractGoogle.access$100(PushRegistratorAbstractGoogle.java:37) 
        at com.onesignal.PushRegistratorAbstractGoogle$1.run(PushRegistratorAbstractGoogle.java:84) 
        at java.lang.Thread.run(Thread.java:923) 

This is my build.gradle (Project):

// Top-level build file where you can add configuration options common to all sub-projects/modules.
buildscript {
    repositories {
        google()
        mavenCentral()
        gradlePluginPortal()
    }
    dependencies {
        classpath "com.android.tools.build:gradle:4.2.0"
        classpath 'com.google.gms:google-services:4.3.8'
        classpath 'gradle.plugin.com.onesignal:onesignal-gradle-plugin:[0.12.10, 0.99.99]'


        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {
    repositories {
        google()
        mavenCentral()
    }
}

task clean(type: Delete) {
    delete rootProject.buildDir
}

And this my App build.gradle:

plugins {
    id 'com.onesignal.androidsdk.onesignal-gradle-plugin'
    id 'com.android.application'
    id 'com.google.gms.google-services'

}

android {
    compileSdkVersion 30

    defaultConfig {
        applicationId "de.kggaming.application"
        minSdkVersion 26
        targetSdkVersion 30
        versionCode 1
        versionName "1.0"

        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }
}

dependencies {

    implementation 'androidx.appcompat:appcompat:1.3.0'
    implementation 'com.google.android.material:material:1.3.0'
    implementation 'androidx.constraintlayout:constraintlayout:2.0.4'
    implementation 'com.google.firebase:firebase-messaging:22.0.0'
    testImplementation 'junit:junit:4.+'
    androidTestImplementation 'androidx.test.ext:junit:1.1.2'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'
    implementation platform('com.google.firebase:firebase-bom:28.0.1')
    implementation 'com.google.firebase:firebase-analytics'
    implementation 'com.onesignal:OneSignal:[4.0.0, 4.99.99]'
}

Here the application class:

package de.kggaming.application;

import android.app.Application;

import com.onesignal.OneSignal;

public class ApplicationClass extends Application {
    private static final String ONESIGNAL_APP_ID = "XXXXXXXXXXXXXXXXXXXXXXXX";
    @Override
    public void onCreate() {
        super.onCreate();
        OneSignal.setLogLevel(OneSignal.LOG_LEVEL.DEBUG, OneSignal.LOG_LEVEL.DEBUG);

        // OneSignal Initialization
        OneSignal.initWithContext(this);
        OneSignal.setAppId(ONESIGNAL_APP_ID);
    }
}

The app don't have any features. Just a empty activity and this onesignal implementation.

Can you help me to get this thing work?

Thank you!

Best regards,

Gismo