POPrince Oliver Syncfusion Team February 11, 2019 06:52 AM
Thank you for contacting Syncfusion support.
We were able to reproduce the reported issue in our end. This script error is raised due to accessing the dialog public method (Open method) before the component is appended to any element in the DOM. So, to fix this, we suggest you append dialog component to any element in the page and then use the open method. We have modified the shared sample, please find the sample at the following location: