Hi Dilip,
Greetings from Syncfusion support.
Based on the shared information, we suspect that you are not
referring the Syncfusion assemblies or script reference in your project
Verify that the correct script references for jQuery,
ej.web.all.min.js and the style reference have been provided.
Refer to the below UG link to know more details on
requirements for getting started.
https://help.syncfusion.com/aspnet-core/gettingstarted/getting-started-2-x
If the issue persists, kindly revert with your Layout and
Razor page to proceed further.
Regards,
Subalakshmi R