Thank you for the provided snippets.
The grid definition appears to be as expected but the scripts and styles are outdated and also the kendo.aspnetmvc.min.js is missing which is likely causing a kendo.syncReady is not a function error in the console. You can verify this by opening the Developer Tools with F12 and checking the console tab.
I am attaching here an ASP.NET Core sample project using the same configuration as you have shared for your reference.
Let us know in case you need further assistance.
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