If you’re already up to date, my first suggestion would be to try Safe Mode. Do lightboxes work if you disable all CSS and plugins.
Next, is access to your site through a proxy, or do you have an out NGINX or Apache system?
If you’re already up to date, my first suggestion would be to try Safe Mode. Do lightboxes work if you disable all CSS and plugins.
Next, is access to your site through a proxy, or do you have an out NGINX or Apache system?