NullPointerException in InvestmentTransactionEditActivity

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E/AndroidRuntime(21737): FATAL EXCEPTION: main E/AndroidRuntime(21737): Process: com.money.manager.ex, PID: 21737 E/AndroidRuntime(21737): java.lang.NullPointerException E/AndroidRuntime(21737): at com.money.manager.ex.investment.InvestmentTransactionEditActivity.onCommissionClick(InvestmentTransactionEditActivity.java:237) E/AndroidRuntime(21737): at com.money.manager.ex.investment.InvestmentTransactionEditActivity_ViewBinding$3.doClick(InvestmentTransactionEditActivity_ViewBinding.java:57) E/AndroidRuntime(21737): at butterknife.internal.DebouncingOnClickListener.onClick(DebouncingOnClickListener.java:22) E/AndroidRuntime(21737): at android.view.View.performClick(View.java:4438) E/AndroidRuntime(21737): at android.view.View$PerformClick.run(View.java:18422) E/AndroidRuntime(21737): at android.os.Handler.handleCallback(Handler.java:733) E/AndroidRuntime(21737): at android.os.Handler.dispatchMessage(Handler.java:95) E/AndroidRuntime(21737): at android.os.Looper.loop(Looper.java:136) E/AndroidRuntime(21737): at android.app.ActivityThread.main(ActivityThread.java:5001) E/AndroidRuntime(21737): at java.lang.reflect.Method.invokeNative(Native Method) E/AndroidRuntime(21737): at java.lang.reflect.Method.invoke(Method.java:515) E/AndroidRuntime(21737): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785) E/AndroidRuntime(21737): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601) E/AndroidRuntime(21737): at dalvik.system.NativeStart.main(Native Method)