Website disappears after updating Appointments+

Hi, I'm using Appointments+ with DIVI theme in multisite mode. It's worked flawlessly for three months until updating today.
http://bentleyluxurycondos.ca

After updating the Appointments+ plugin, all pages disappeared except for the Header.
Same on different browsers and on mobile.

Disabling Appointments+ brought back the website
Any ideas?
Thanks!

Rob