reCAPTCHA isn't working!

Hi,
reCAPTCHA was working fine on our site, but it’s suddenly stopped….

http://manapc.org.nz/contact-us

The form label is there for reCAPTCHA, but no ‘i am not a robot’ box… and all forms fail as it’s missing…

Any ideas?! Urgent….. have tried removing and re-adding reCAPTCHA to the form but no difference. Plugin and wordpress etc is up to date.

thanks
Rachael

https://ww.wp.xz.cn/plugins/formidable/