JS error is thrown when a Responce.Redirect() is made after editing an image in RadImageEditor. Steps to reproduce: 1. Run the following code: <telerik:RadImageEditor ID="ImageEditorControl" runat="server" RenderMode="Classic" Width="790px" Height="430px" ImageUrl="~/Images/bhp-500l.jpg"> </telerik:RadImageEditor> <asp:Button ID="Button3" runat="server" Text="Redirec" OnClick="Button3_Click" /> Protected Sub Button3_Click(sender As Object, e As EventArgs) Handles Button3.Click Response.Redirect("https://www.google.bg/") End Sub 2. Open the Pencil tool and draw something on the image 3. Click the Redirect button Result: A JavaScript error is thrown.