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

In my case (ASP.NET 4.6, Visual Studio 2015) I commented an asp text control and added a new asp drop down list but did not updated the AssociatedControlID of the associated label.

on changing the AssociatedControlID to newly added asp drop down list ID my problem was fixed.