Hey, I've used this before and it worked great...now I'm getting an error: Display Error: The display template had an error. You can correct it by fixing the template or by changing the display template used in either the Web Part properties or Result Types.

null is not an object (evaluating 'ctx.CurrentItem['SecondaryFileExtension'].toString') (CoreRender: ~sitecollection/_catalogs/masterpage/Display Templates/madcowgraph/mAdcOW_GraphItem.js)

Can't find variable: jQuery (OnPostRender: )