Hello @wpmudev-support2,
I currently deactivated the slide-in due to the error. The hustle pop-ups, which you have seen have nothing to do with it. They are active and work perfectly.
There are no more rules except that one. In which files does the desktop or mobile detection take place?
I’ve set “… /wp-content/plugins/wordpress-popup/assets/js/shared-ui.min.js” to never minify. That solved the problem on iOS. However, it still exists on iPadOS and Android.
Kind regards,
Alex