BookingBug script being blocked

Up until today my bookingbug has worked fine. I have the script set up on my Calendar/classes page.

Now it is being blocked and the only way to show it is to tell my browser to allow scripts, which then gives me a message saying that the script isn’t authenticated. I’ve found the short code from BookingBug, but I don’t know where to put it or how to install it onto a page. I don’t want a widget on every page, only on the Calendar/Classes page.

Shortcode: [bookingbug id=’usw3546631′ style=’large’]
Script: <script type=”text/javascript” src=”https://us.bookingbug.com/widget/all.js?id=usw3546631&width=730&height=570&style=large”></script&gt;

Thank you for your help,
Arina
localartisancollective.com