Closed Unassigned: UpdatePanelAnimationExtender - null reference at AsyncPostBackTrigger cast [27979]

Hi,

When I try to use UpdatePanelAnimationExtender I'm always getting the error Object reference not set to an instance of an object.
My project worked fine until I updated Ajax Control Toolkit to version 15.1.4

Thank you,
Comments: AJAX Control Toolkit was moved to GitHub: https://github.com/DevExpress/AjaxControlToolkit The fix for this issue is available with the v16.1 release: https://github.com/DevExpress/AjaxControlToolkit/releases/tag/16.1.0