System.InvalidOperationException: Stack empty

Question

Once running ASP.NET 4.x application built in Visual Studio 2013 I am getting the below exception.

I have tried to disable the PageInspector by removing page inspect

Answer 1

Hope this help somebody.

I was getting this error when my asp:panel has a default button say XYZ and I modified the name XYZ and forgot to change default button name in panel.