The following JavaScript error is thrown when RadSignature is used along with asp:ScriptManager:
Sys.InvalidOperationException: '_uniqueId' is not a property or an existing field.
Temporary workaround:
Replace the asp:ScriptManager with a RadScriptManager:
<telerik:RadScriptManager ID="RadScriptManager1" runat="server"></telerik:RadScriptManager>
<telerik:RadSignature runat="server" ID="RadSignature1"></telerik:RadSignature>
Regards,
Doncho
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