Hi Gian,
Thanks for contacting Syncfusion’s support.
We are sorry that we are unable to reproduce any issue while copy and paste the sample code from sample browser and we created a separate sample for this requirement that can be downloaded from the below link.
And hence could you please provide the following details.
1. Confirm whether the problem on Grid rendering or the problem on editing.
2. If the problem on editing, please ensure the relative path of CrudURL of grid’s DataSource whether it is correctly mapped to action in server.
3. Share your console page with call stack, if any exception or script error throws.
4. If possible, please reproduce your issue on the above attached sample with replication procedure.
5. Provide more details of your issue.
Regards,
Saravanan A.