Site change without content, slider, etc

Dear all,

I have grant the acces to WPMU team to investigate some issue and now I see the site is change without content. What happen? Today at launch all was ok and in the night is nok, the only variation of today in my website is the connection of Vaughan 25/10/2016 @ 16:51.

Please explain what change and what we can make to come back to the ok situation.