VK Api Ошибка java.lang.NoClassDefFoundError

java.lang.NoClassDefFoundError: 
  at com.vk.sdk.api.VKRequest.getRegisteredRequest (VKRequest.java:649)
  at com.vk.sdk.VKSdk.processActivityResult (VKSdk.java:264)
  at com.vk.sdk.VKUIHelper.onActivityResult (VKUIHelper.java:104)
  at app.media.in.LoginActivity.onActivityResult (LoginActivity.java:239)
  at android.app.Activity.dispatchActivityResult (Activity.java:7780)
  at android.app.ActivityThread.deliverResults (ActivityThread.java:4995)
  at android.app.ActivityThread.handleSendResult (ActivityThread.java:5044)
  at android.app.servertransaction.ActivityResultItem.execute (ActivityResultItem.java:49)
  at android.app.servertransaction.TransactionExecutor.executeCallbacks (TransactionExecutor.java:108)
  at android.app.servertransaction.TransactionExecutor.execute (TransactionExecutor.java:68)
  at android.app.ActivityThread$H.handleMessage (ActivityThread.java:2155)
  at android.os.Handler.dispatchMessage (Handler.java:109)
  at android.os.Looper.loop (Looper.java:207)
  at android.app.ActivityThread.main (ActivityThread.java:7539)
  at java.lang.reflect.Method.invoke (Native Method)
  at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run (RuntimeInit.java:524)
  at com.android.internal.os.ZygoteInit.main (ZygoteInit.java:958)
Caused by: java.lang.ClassNotFoundException: 
  at dalvik.system.BaseDexClassLoader.findClass (BaseDexClassLoader.java:134)
  at java.lang.ClassLoader.loadClass (ClassLoader.java:379)
  at java.lang.ClassLoader.loadClass (ClassLoader.java:312)

  @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        VKUIHelper.onCreate(LoginActivity.this);
        VKSdk.initialize(sdkListener, String.valueOf(MyAppID), 
         VKAccessToken.tokenFromSharedPreferences(this, sTokenKey));
 
        final Button ENTER = findViewById(R.id.button_Enter);
        ENTER.setOnClickListener(view -> {
           VKSdk.authorize(Scope, false, true);
          });
}
 
 
 
   @Override
   protected void onActivityResult(int requestCode, int resultCode, Intent data) {
       VKUIHelper.onActivityResult(this, requestCode, resultCode, data);
     }
 
    private VKSdkListener sdkListener = new VKSdkListener() {
        @Override
        public void onCaptchaError(VKError captchaError) {
           new VKCaptchaDialog(captchaError);
        }
 
        @Override
        public void onTokenExpired(VKAccessToken expiredToken) {
                VKSdk.authorize(Scope, false, true);
              }
 
        @Override
        public void onAccessDenied(VKError authorizationError) {
                showErrorDialog();
        }
 
        @Override
        public void onReceiveNewToken(VKAccessToken newToken) {
           newToken.saveTokenToSharedPreferences(LoginActivity.this, sTokenKey);
          Intent i = new Intent(LoginActivity.this, MainActivity.class);
          startActivity(i);
 
        }
 
        @Override
        public void onAcceptUserToken(VKAccessToken token) {
              Intent i = new Intent(LoginActivity.this, MainActivity.class);
              startActivity(i);
 
        }
    };
 
 
    @Override
    public void onResume(){
        super.onResume();
          VKUIHelper.onResume(this);
    }
 
 
    @Override
    protected void onDestroy() {
        super.onDestroy();
        VKUIHelper.onDestroy(this);
    }