lightbox_html is not defined

Hi,

I bought the Huge It portfolio-gallery but I’m getting the error :

Uncaught ReferenceError: lightbox_html is not defined jquery.colorbox.js:13

I know that this error only occurs when I’m not on the portfolio page, wich mean pretty much the whole site. Is there a way to load it only when I’m on the portfolio page? Or is there another fix?

Exemple 1 (page without the portfolio) :
http://entrepreneur-renovation.ca/

Exemple 2 (page with the portfolio) :
http://entrepreneur-renovation.ca/realisation-commerciales/

Plugin :
https://wordpress.org/plugins/portfolio-gallery/

Thanks for you support
Grattton