Aug 13, 2019 04:32 AM|KathyW|LINK
There is really nothing we can do when you say you've followed all the steps in that link, but that it doesn't work. If you follow all the steps, it should work, and we can't tell you what you are missing.
Regardless, if you have purchased Telerik controls, the place to get support is on their website.
https://www.telerik.com/support/aspnet-mvc They have forums and other support channels for paying customers.