Error java.lang.NoClassDefFoundError in GooglePlay Console

[MateuszPrasal]

Hi !
Last time I noticed error in GooglePlay Console, which is repeated very often :

java.lang.NoClassDefFoundError: 
  at com.rollbar.notifier.sender.AbstractSender.<init> (AbstractSender.java:24)
  at com.rollbar.notifier.sender.SyncSender.<init> (SyncSender.java:34)
  at com.rollbar.notifier.sender.SyncSender$Builder.build (SyncSender.java:155)
  at com.rollbar.notifier.sender.BufferedSender$Builder.build (BufferedSender.java:189)
  at com.rollbar.android.Rollbar.<init> (Rollbar.java:253)
  at com.rollbar.android.Rollbar.<init> (Rollbar.java:201)
  at com.rollbar.android.Rollbar.init (Rollbar.java:112)
  at com.rollbar.RollbarReactNative.init (RollbarReactNative.java:37)
  at com.promotons.MainApplication.onCreate (MainApplication.java:79)
  at android.app.Instrumentation.callApplicationOnCreate (Instrumentation.java:1007)
  at android.app.ActivityThread.handleBindApplication (ActivityThread.java:4632)
  at android.app.ActivityThread.access$1800 (ActivityThread.java:141)
  at android.app.ActivityThread$H.handleMessage (ActivityThread.java:1298)
  at android.os.Handler.dispatchMessage (Handler.java:102)
  at android.os.Looper.loop (Looper.java:136)
  at android.app.ActivityThread.main (ActivityThread.java:5333)
  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:895)
  at com.android.internal.os.ZygoteInit.main (ZygoteInit.java:711)
  at dalvik.system.NativeStart.main (Native Method)

I'm using RN 0.59.8 and rollbar-react-native ^0.3.3. I've tried looking for some solutions about this issue, but unfortunately without success.
Maybe anyone has similar problem ?

Thank you for all suggestions :)