Hi Nofian,
Sorry for the inconvenience caused.
Could you please provide us the Exception log file(s) generated to proceed further? The exception log file(s) can be found in the following location.
“%AppData%\Syncfusion\DashboardDesigner\1.1.0.199\IISExpress_DashboardService\ErrorLog”
Regards,
Pragadeesh Naran N.