Thank you for showning an image of the error - it is clear that you do not have such method available on your side. It the thread information you have marked t hat you are using version 2012.3 1114,
can you confirm that?
If you are using an older version could you please update to the latest official version and see if the method is available?
the Telerik team
Join us on our journey to create the world's most complete HTML 5 UI Framework - download Kendo UI