Dashboard loaded but the rest does not work – Upfront builder help

If I use the menu on the left for plug in or theme i get this message in the respective category “Cannot load wpmudev-themes.” (OR PLUG IN ETC)

I went to the green button for upfront builder – went slick – straight install. On trying to activate it got a message saying missing a core (or base) upfront and provided a link – select the base template and say install – goes back to Cannot load wpmudev-themes.