Format/design issues after WPMUDev installations

Hello,

My website http://www.clanihc.com seems to be broken at the front end (you can see the nav isnt right, the slider images aren’t appearing, other images aren’t appearing).

It was working fine prior to installing WPMUDev plugins; it was also working fine during the process too, but something seems to have broken it somehow.

Can you investigate?