Loading icon appears for vimeo link, but lightbox and video never appear.

Anyone else having trouble getting vimeo videos to load? Here is the code I’m using:

<a href="https://vimeo.com/88308841" rel="lightbox-6">Click here for video</a>

The loading icon appears but that’s it, nothing else happens. Any ideas?

Thanks,
Jeremy

https://wordpress.org/plugins/responsive-lightbox/