I also find that if only comment out ".ClientDetailTemplateId("BenchmarksTemplate")", it still crashes with message:
"The model item passed into the dictionary is null, but this dictionary requires a non-null model item of type 'System.Int32'."
Only if we comment out entire section of <script id="BenchmarksTemplate" type="text/kendo-tmpl">, it will display the 1st grid correctly, but without arrow in each grid row.
Any thought on this?