Construct 3 uncaught error

So, I just tried to open the demo-pool file from you guys, and I get this error on the console:

Uncaught TypeError: Cannot read property 'Photon' of undefined
at b497a020-dc67-40ab-a228-4b2815ace75c:4

The strange thing is that it was working last week, and I've made no changes.

Any ideas? Thanks!