I got this run-time error instead.
"Could not load file or assembly 'Telerik.OpenAccess, Version=2010.1.310.2, Culture=neutral, PublicKeyToken=7ce17eeaf1d59342' or one of its dependencies. The system cannot find the file specified."
The debugger flagged the error inside Default.aspx.cs especfically the line in bold below.
protected
void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
EmployeesListView.Rebind();