PHP in Elements suddenly stopped working!

I have a few Hook elements set up with PHP rendering the content that have been working perfectly well - until today where it now seems that the PHP is not being executed properly - for example:

http://demo.onecards.co.uk/location/retford/ - should have a number of posts displayed under 'Our Team'
http://demo.onecards.co.uk/staff-member/john-smith/ - should have a load of contact information displayed

These have been working fine until this afternoon - last plugin updates were a few days ago. It's a multisite too.

I have set up the following:

But it give this:

http://demo.onecards.co.uk/sample-page/

Any idea why the PHP has stopped working?

Thanks