Google Play Crash on first launch (ANDROID) java.lang.RuntimeException:

Hello,
I’m getting this crash ONLY on the first launch of my App made in Unreal Engine 4 on google play, it’s not happening through Launch within the UE4 project, but only after releasing to google play (beta testing).
I would be really happy for any help, I couldn’t find anything that would help me…
It crashes on every device, but just first launch. (Tried 6 of them).

java.lang.RuntimeException:

at android.app.ActivityThread.handleReceiver (ActivityThread.java:3095)

at android.app.ActivityThread.-wrap18 (ActivityThread.java)

at android.app.ActivityThread$H.handleMessage (ActivityThread.java:1613)

at android.os.Handler.dispatchMessage (Handler.java:110)

at android.os.Looper.loop (Looper.java:203)

at android.app.ActivityThread.main (ActivityThread.java:6314)

at java.lang.reflect.Method.invoke (Native Method)

at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run (ZygoteInit.java:1063)

at com.android.internal.os.ZygoteInit.main (ZygoteInit.java:924)

Caused by: java.lang.ClassNotFoundException:

at dalvik.system.BaseDexClassLoader.findClass (BaseDexClassLoader.java:56)

at java.lang.ClassLoader.loadClass (ClassLoader.java:380)

at java.lang.ClassLoader.loadClass (ClassLoader.java:312)

at android.app.ActivityThread.handleReceiver (ActivityThread.java:3090)

Hello,

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Thanks

Same issue here, any luck?