Cannot get tabbed elements Dashboard to work using the provided example

I have been uable to get https://xlinesoft.com/blog/2023/08/22/tabbed-elements-in-dashboards/ to work on ASPRunner.net v11.2. So I started over by using a simple SQL Server Northwind database instance that I built in a couple minutes before adding the Dashboard touches called out by the provided sample. In the Northwind Dashboard I am aiming for just 2 tabs to independently show Customers and Products lists. Since that did not work I moved to debugging in Visual Studio with break points: first I hit the breakpoint on the Dashboard PageLoad Javascript and that Javascript runs to completion - in other words it did not fail silently as JS runtime errors commonly do. Continuing on in VS I hit the C# break in the called out 2 line Dashboard Snippet and at that point the web page output is still blank. I hit run again in VS and finished displaying the tabless Dashboard page.

In development, I added dashboard elements in the following chronological order: Dashboard Snippet, Customers Grid (without buttons), Products Grid (without buttons). I attached various Dasboard page Designer screen shots, the Dasboard PageLoad JS code (slightly ammended from the example), and a screenshot of the web page output in a single word doc. I did not include the examples CSS changes as it complicated matters and did not help.

Thank you for the help.