WPMU Dashboard Issue

Hello,

I am having an issue with the WPMU Dev Dashboard on this site. It has been installed correctly, but the dashboard does not look right, and is not allowing me to install plugins. The plugin page is just all gray and says "no plugins found". There is a search bar, but using it doesn't do anything. The dashboard plugin has been uninstalled and reinstalled with the most recent version, but still no change. Can you advise?

Thank you.