Error rendering control in design view in visual webpart(An error occured while fetching preview) for people picker control when opening form in design view..Cant view the people picker in design view..How to make it visible..
<SharePoint:PeopleEditor runat="server" ID="peoplePickerControl" AllowEmpty="True" AllowTypeIn="True" MultiSelect="False" PrincipalSource="Windows" SelectionSet="User" />