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1.Open the page which SfImageEditor is put.

2.Tap the Text and Opacity on the toolbar.

3.Tap the Opacity slide. Then, the application will break.

This is the stack trace.

System.NullReferenceException: Object reference not set to an instance of an object

  at Syncfusion.SfImageEditor.iOS.SfImageEditor.StartStrokeThickness (System.Int32 strokeThickness) [0x0001b] in :0

  at Syncfusion.SfImageEditor.iOS.ToolBarLayout.StrokethicknessSlider_TouchDown (System.Object sender, System.EventArgs e) [0x0000c] in :0

  at UIKit.UIControlEventProxy.Activated () [0x00004] in /Library/Frameworks/Xamarin.iOS.framework/Versions/

  at at (wrapper managed-to-native) UIKit.UIApplication.UIApplicationMain(int,string[],intptr,intptr)

  at UIKit.UIApplication.Main (System.String[] args, System.IntPtr principal, System.IntPtr delegate) [0x00005] in /Library/Frameworks/Xamarin.iOS.framework/Versions/

  at UIKit.UIApplication.Main (System.String[] args, System.String principalClassName, System.String delegateClassName) [0x0000e] in /Library/Frameworks/Xamarin.iOS.framework/Versions/