Are you the developer or the site owner? If the latter, you need to contact the developer of the site as it looks like your theme is custom made.
I made the Custom WP Theme on my own, the HTML before the theme worked (http://www.villamilani.com/villaMilaniTheme/), but now something go wrong!
So is your issue that when the menu is in “hamburger mode”, the sub-items for ‘exclusive hire’ don’t appear?
I can force it with a “display: block” but I’m not sure how one would activate that via bootstrap.
no, my problem is also for the desktop version, the dropdowns are opens but if I try to open a sub-voice the dropdown closes.