java.lang.RuntimeException: Unable to resume activity {com.blogspot.tipsberk.ultimatemap/com.blogspot.tipsberk.ultimatemap.SignupActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.ProgressBar.setVisibility(int)' on a null object reference

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Unable to resume activity {com.blogspot.tipsberk.ultimatemap/com.blogspot.tipsberk.ultimatemap.SignupActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.ProgressBar.setVisibility(int)' on a null object reference
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Unable to resume activity {in.whoopee.myportfolio/in.whoopee.myportfolio.MfInvestedSchemeDetailActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void com.google.android.gms.ads.AdView.resume()' on a null object reference
java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.ProgressBar.setVisibility(int)' on a null object reference
at com.blogspot.tipsberk.ultimatemap.SignupActivity.onResume(SignupActivity.java:101)
at android.app.Instrumentation.callActivityOnResume(Instrumentation.java:1267)
at android.app.Activity.performResume(Activity.java:6178)

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