Website is blank, issue with Lightbox and CMS content

Hi everyone!
I redesigned my website from scratch recently but when I publish it, I get a blank page. I have included a Lightbox connected to my portfolio CMS Collection, can it be the reason?

Here is my public share link: LINK
(how to access public share link)

@Arthur_Liegeois - The issue is your page load animation. It is hiding the page and never transitions.