Crash while parsing speakers

[mtthsfrdrch]

java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String[] java.lang.String.split(java.lang.String)' on a null object reference at de.devfest.data.firebase.FirebaseSpeakerManager$SpeakerExtractor.convert(FirebaseSpeakerManager.java:83) at de.devfest.data.firebase.FirebaseSpeakerManager$SpeakerExtractor.convert(FirebaseSpeakerManager.java:60) at de.devfest.data.firebase.FirebaseExtractor.onDataChange(FirebaseExtractor.java:29) at com.google.android.gms.internal.zzajp.zza(Unknown Source) at com.google.android.gms.internal.zzakp.zzcxi(Unknown Source) at com.google.android.gms.internal.zzaks$1.run(Unknown Source) at android.os.Handler.handleCallback(Handler.java:751) at android.os.Handler.dispatchMessage(Handler.java:95) at android.os.Looper.loop(Looper.java:154) at android.app.ActivityThread.main(ActivityThread.java:6077) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:865) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755)