after connecting with firebase app is not working

[HumayraAfrin]

Process: com.example.bookfinderapp, PID: 30550
java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.ProgressBar.setVisibility(int)' on a null object reference
at com.example.bookfinderapp.Activities.RegisterActivity.CreateUserAccount(RegisterActivity.java:119)
at com.example.bookfinderapp.Activities.RegisterActivity.access$600(RegisterActivity.java:36)
at com.example.bookfinderapp.Activities.RegisterActivity$1.onClick(RegisterActivity.java:90)
at android.view.View.performClick(View.java:5675)
at android.view.View$PerformClick.run(View.java:22651)
at android.os.Handler.handleCallback(Handler.java:836)
at android.os.Handler.dispatchMessage(Handler.java:103)
at android.os.Looper.loop(Looper.java:208)
at android.app.ActivityThread.main(ActivityThread.java:6267)
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)

[aws1994]

please recheck your progress bar

[ddyachok]

I have the same problem, even on your app, downloaded from github😭

[AlephQuiroz]

they found the solution?' 😭😭😭