The primary issue for me is any iframe
type links are opening instead of going to lightbox.
So after updating WP to v5.5.1 with all plugins updated including Responsive Lightbox Pro the lightbox stops working.
Rolling the live site back to WP v5.4.2 fixed it but I can’t update WP now without resolving it or replacing the lightbox.
I checked the defer
method but it made no difference, either way, jQuary excluded or not. All caching cleared.
The site Services page has two iframe link types: google map links in header and footer, and each service link opens to lightbox. That link is to the working site not a broken version.
It was the WP update that broke it.
No obvious console or network errors in the browser.
I had a look at the demo and changed the rel value from lightbox
to lightbox-video-0
just in case but no joy.
I am running a site dev version (v5.5.1) that is not working so I can try things and provide feedback.
Any help appreciated.