I had the opportunity of hiring a company to create a couple of layout pages for us. When I finally got them I get the following error message in SPD and the breadcrumbs are no longer showing up:
Error Creating Control - TopNavigationMenuV4 This control cannot be displayed because its TagPrefix is not registered in the Web Form. Error Creating Control - TopNavigationDelegate This control cannot be displayed because its TagPrefix is not registered in the Web Form.
What do I have to do to fix this issue?