Hi Nam
Thank you for using our Syncfusion Products.
We have checked the reported query and observe that you are using license key properly and also the respective version has been referred properly at your end. However we are unable to trace the exact cause of the reported behavior. So could you please ask let us know your project framework details whether .NET Framework or .NET Core? It would be helpful for us to proceed on it further.
Please let us know if you need any other assistance on this.
Regards,
Vijayalakshmi VR