app crashes on Android device when button(btnCreateTask) is pressed  #1

Crash Log:

java.lang.NoClassDefFoundError: Failed resolution of: Lcom/facebook/react/ReactRootView;
at com.konylabs.js.api.WidgetFactory.createWidget(UnknownSource:326)
at com.konylabs.vm.Function.executeJS(Native Method)
at com.konylabs.vm.Function.a(UnknownSource:180)
at com.konylabs.vm.Function.b(UnknownSource:176)
at com.konylabs.vm.Function.execute(UnknownSource:154)
at com.konylabs.vmintf.KonyJavaScriptVM.a(UnknownSource:551)
at com.konylabs.android.an.handleMessage(UnknownSource:289)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:201)
at com.konylabs.android.ac$a.run(UnknownSource:357)
Caused by: java.lang.ClassNotFoundException: Didn't find class "com.facebook.react.ReactRootView" on path: DexPathList[[zip file "/system/framework/org.apache.http.legacy.boot.jar", zip file "/data/app/com.orgname.reactNativeSample-Ru1UT0bGUVKgCWABOJFJmA==/base.apk"],nativeLibraryDirectories=[/data/app/com.orgname.reactNativeSample-Ru1UT0bGUVKgCWABOJFJmA==/lib/arm, /system/fake-libs, /data/app/com.orgname.reactNativeSample-Ru1UT0bGUVKgCWABOJFJmA==/base.apk!/lib/armeabi-v7a, /system/lib]]
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:171)
at java.lang.ClassLoader.loadClass(ClassLoader.java:379)
at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
... 10 more