Hi,

Thank you, that solved the issue.

The problem was caused by a Cloudflare rule blocking requests to /wp-admin/admin-ajax.php. After excluding this endpoint from the wp-admin protection rule, the video pop-up works correctly on mobile (iOS) as well.

Thanks again for your help.

This looks like a frontend issue, not a content or backup problem.

Since the error appears on all pages, persists after restoring backups, and keeps multiplying when the page is left open, it’s very likely caused by JavaScript or caching interfering with the builder.

Please try the following steps:

Disable all JS/CSS optimization:
Turn OFF JS Combine
Turn OFF JS Delay/Defer
Turn OFF CSS Combine
If Cloudflare is active:
Disable Rocket Loader
Purge all Cloudflare cache
Clear all caches:
LiteSpeed Cache
Server cache (Hostinger)
Browser cache
Test the site in Incognito mode
Temporarily disable all plugins except the theme and see if the issue persists

This should help identify whether it’s caused by caching or a plugin conflict, which is the most likely reason for this error.