java.lang.NullPointerException

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  • java.lang.NullPointerException: Can't pass null for argument 'pathString' in child() at com.google.firebase.database.g.a(Unknown Source) at com.test.finalapp.Activities.PreMainActivities.c.a(Unknown Source) at com.google.firebase.database.p.a(Unknown Source) at com.google.android.gms.c.ha.a(Unknown Source) at com.google.android.gms.c.iv.b(Unknown Source) at com.google.android.gms.c.jb.run(Unknown Source) at android.os.Handler.handleCallback(Handler.java:739) at android.os.Handler.dispatchMessage(Handler.java:95) at android.os.Looper.loop(Looper.java:152) at android.app.ActivityThread.main(ActivityThread.java:5507) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
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