Thanks for using Syncfusion products.
We suspect that the issue may arise due to the blocking of “browser pop-ups” in the browser settings. Therefore, we request you to check the browser settings, whether the “browser popup’s” are allowed or blocked.
Please find refer the following blog link to enable the browser pop-ups.
Please let us know if it helps, otherwise revert back to us with some information like issue reproducing steps and also your browser details, which is more helpful for us to trace the root cause of the issue and provide you the better solution on this.
Thanks for your update.
We are able to reproduce the reported issue in our end and we have logged a defect report for this and the fix for this will be included in our upcoming main release volume 1, 2015.
Please let us know if you require any further assistance on this.