I have a .NET 4.5 webforms site that uses a mixture of Telerik AJAX Tools and ASP.NET AJAX tools. Separately these tools work fine, but I have one page that has a RadTabStrip, RadMultiPage items, and RadGrids, along with an ASP.NET UpdatePanel with some ModalPopupExtender controls. Now, in my local dev environment and my staging environment, this page works as intended. In my grid, I have a link on each row that, when clicked, opens a modal popup. However, when I move this to our production web server, the popups don't render and I get the following error returned:
SCRIPT5022: Sys.WebForms.PageRequestManagerServerErrorException: An unknown error occurred while processing the request on the server. The status code returned from the server was: 404
Not sure what is wrong, as both staging and production environments are the same. Here is the markup for the page that is having trouble:
Is there something I'm missing, or could there be a setting on the web server that is causing the error to be thrown?