Commented Unassigned: UpdatePanelAnimationExtender - Object reference not set to an instance of an object [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: This indicates some problems with the UpdatePanelAnimationExtender.AnimationTarget property. However, I cannot say something more specific, because I haven't seen your application code. Please provide a sample project showing the problem so that I can research it and find the cause.