Problem with checkbox

Hey guys,

First of all, thank you very much for this awesome plugin, I use it all the time.

On this site, I’m encountering problems to use the checkbox (it’s not clickable) and I haven’t found the reason. Could you please give me a hand?

Thanks in advance.

Have a great day.

Elías Huerta Mojica

The page I need help with: [log in to see the link]