Problem with Telerik.Web.UI, Version=2015.1.225.45

Hello,

I assume that you had already revised the following article, describing the cause and the solutions for such problems:
http://www.telerik.com/forums/telerik-web-ui-webresource-axd-unhandled-exception
If you are not, please try the provided solutions and let us know the behavior.

You can also check the following article in the documentation:
http://www.telerik.com/help/aspnet-ajax/web-resources-troubleshooting.html 

Another thing you can try is the script CDN we offer: http://www.telerik.com/help/aspnet-ajax/scriptmanager-cdn-support.html so that the scripts are not loaded from your own server, in case the problem stems from the webresource requests.

If you are using RadScriptManager you can try disabling the script combining by setting the EnableScriptCombine property to false and see if it makes any difference.

Regards,
Pavlina
Telerik