Hi Naveed,
Thank you for contacting Syncfusion support.
This issue may have occurred due to one of the following reasons.
• There may be a chance of jQuery file is referred after the Syncfusion Scripts (ej.web.all.min.js).
So, please check there is any second occurrence of jQuery script in the page after “ej.web.all.min.js” is referred. If yes, please remove the second duplicate reference in the page.
• Syncfusion Scripts are not loaded properly.
So, please open the developer tools of the browser window and ensure the necessary scripts are loaded properly.
• Ensure whether the “ScriptManager” is added in the “Site.Master” or else add the “ScriptManager” to your web page.
Please try out the above suggested solution. If still you are facing any issue, please share “Site.Master” page, share the details. This will be helpful us to analyze and provide an appropriate solution.
Regards,
Sureshkumar P