User list has dissapeared!

Hey guys,
My site has been doing just fine since it’s inception, but all of a sudden the user list has just dissapeared which is terrible timing as we just publically launched the site and now, but can’t change the privelages of client’s accounts to let them view hidden content!

https://www.complispacetv.com.au <—You can check it out here if you need to

All I’m doing is clicking ‘Users’ from the left side bar of the dashboard which, obviouly, takes you to the user list – but despite it saying we have 32 users, it’s not showing any of them?

What’s strange, however, is that when I click on the ‘Administrator’ list instead of ‘Subscriber’ or ‘All’ – it will show the list of admins?

I took a couple of screenshots to you show what I mean –

This is what the user list looks like for me at the moment:
User List

And this is what the admin list looks like:
Admin List

If anyone could help me out that would be amazing! Preferably fast though, so I don’t get angry boss/clients after me ??