app crashes when i tap twice to open multimedia

[ahmedfayed29]

E/ (31654): [ZeroHung]zrhung_get_config: Get config failed for wp[0x0008]
D/AndroidRuntime(31654): Shutting down VM
E/AndroidRuntime(31654): FATAL EXCEPTION: main
E/AndroidRuntime(31654): Process: com.sa.aait.easyhome.easyhome, PID: 31654
E/AndroidRuntime(31654): java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=23421, result=0, data=null} to activity {com.sa.aait.easyhome.easyhome/com.sa.aait.easyhome.easyhome.MainActivity}: java.lang.NullPointerException: Attempt to invoke interface method 'void io.flutter.plugin.common.MethodChannel$Result.success(java.lang.Object)' on a null object reference
E/AndroidRuntime(31654): at android.app.ActivityThread.deliverResults(ActivityThread.java:5078)
E/AndroidRuntime(31654): at android.app.ActivityThread.handleSendResult(ActivityThread.java:5120)
E/AndroidRuntime(31654): at android.app.servertransaction.ActivityResultItem.execute(ActivityResultItem.java:49)
E/AndroidRuntime(31654): at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108)
E/AndroidRuntime(31654): at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68)
E/AndroidRuntime(31654): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2199)
E/AndroidRuntime(31654): at android.os.Handler.dispatchMessage(Handler.java:112)
E/AndroidRuntime(31654): at android.os.Looper.loop(Looper.java:216)
E/AndroidRuntime(31654): at android.app.ActivityThread.main(ActivityThread.java:7625)
E/AndroidRuntime(31654): at java.lang.reflect.Method.invoke(Native Method)
E/AndroidRuntime(31654): at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:524)
E/AndroidRuntime(31654): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:987)
E/AndroidRuntime(31654): Caused by: java.lang.NullPointerException: Attempt to invoke interface method 'void io.flutter.plugin.common.MethodChannel$Result.success(java.lang.Object)' on a null object reference
E/AndroidRuntime(31654): at com.javih.multimediapicker.MultiMediaPickerDelegate.finishWithSuccess(MultiMediaPickerDelegate.java:531)
E/AndroidRuntime(31654): at com.javih.multimediapicker.MultiMediaPickerDelegate.handleChooseImagesResult(MultiMediaPickerDelegate.java:434)
E/AndroidRuntime(31654): at com.javih.multimediapicker.MultiMediaPickerDelegate.onActivityResult(MultiMediaPickerDelegate.java:387)
E/AndroidRuntime(31654): at io.flutter.app.FlutterPluginRegistry.onActivityResult(FlutterPluginRegistry.java:204)
E/AndroidRuntime(31654): at io.flutter.app.FlutterActivityDelegate.onActivityResult(FlutterActivityDelegate.java:131)
E/AndroidRuntime(31654): at io.flutter.app.FlutterActivity.onActivityResult(FlutterActivity.java:142)
E/AndroidRuntime(31654): at android.app.Activity.dispatchActivityResult(Activity.java:7797)
E/AndroidRuntime(31654): at android.app.ActivityThread.deliverResults(ActivityThread.java:5071)
E/AndroidRuntime(31654): ... 11 more