import LicenseManager from '@syncfusion/ej2-base';
A: You likely have a mismatch. One DLL might be referencing an older version. Clean your solution, delete bin and obj folders, and rebuild. syncfusion trial license key fix
If you did not finish evaluating the product and your trial has expired, you cannot generate a new key yourself. You must request an extension from Syncfusion support. import LicenseManager from '@syncfusion/ej2-base'
You must register the license key before any Syncfusion components are rendered. Here is where to apply the fix based on your tech stack. For ASP.NET Core / Blazor delete bin and obj folders