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Anyone Know How To Fix java.lang.ClassNotFoundException Crash In Google Play?

I have released my game on Android Google Play. And I have changed the manifest information as you see below.
But I am getting crashes in Google Play, when people try loading the game saying:

java.lang.ClassNotFoundException in dalvik.system.BaseDexClassLoader.findClass

Also I read in this forum post from Michael Noland about… “but there might be issues with where the activity java file ends up”
I believe I have this issue, but have no idea on how to fix the error or make sure I am using the correct location to find the java file.

Any help would be appreciated, thank you.

IN THE MANIFEST:

I changed:

from… package=“com.epicgames.${EXECUTABLE_NAME}”
to… package=“com.dreambotstudios.${EXECUTABLE_NAME}”

from… activity android:name=“com.epicgames.ue4.GameActivity”
to… activity android:name=“com.dreambotstudios.ue4.GameActivity”

from… meta-data android:name=“com.epicgames.ue4.GameActivity.DepthBufferPreference” android:value=“0”/>
to… meta-data android:name=“com.dreambotstudios.ue4.GameActivity.DepthBufferPreference” android:value=“0”/>

**IN GOOGLE PLAY CRASH **
java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.dreambotstudios.BlitzBoom/com.dreambotstudios.ue4.GameActivity}: java.lang.ClassNotFoundException: Didn’t find class “com.dreambotstudios.ue4.GameActivity” on path: DexPathList[zip file “/data/app/com.dreambotstudios.BlitzBoom-1.apk”],nativeLibraryDirectories=[/data/app-lib/com.dreambotstudios.BlitzBoom-1, /vendor/lib, /system/lib]]
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2231)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2363)
at android.app.ActivityThread.access$900(ActivityThread.java:161)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1265)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:157)
at android.app.ActivityThread.main(ActivityThread.java:5356)
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:1265)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1081)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.ClassNotFoundException: Didn’t find class “com.dreambotstudios.ue4.GameActivity” on path: DexPathList[zip file “/data/app/com.dreambotstudios.BlitzBoom-1.apk”],nativeLibraryDirectories=[/data/app-lib/com.dreambotstudios.BlitzBoom-1, /vendor/lib, /system/lib]]
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:67)
at java.lang.ClassLoader.loadClass(ClassLoader.java:497)
at java.lang.ClassLoader.loadClass(ClassLoader.java:457)
at android.app.Instrumentation.newActivity(Instrumentation.java:1079)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2222)

I also posted in AnswerHub this question…
https://answers.unrealengine.com/questions/132897/android-launch-javalangclassnotfoundexception.html