when i try to open submenus in the primary menu on iOS there is no reaction. You can test it on the website given above.
I’ve also tested it with the developer mobile mode of Chrome, the buttons are working there.
In both cases it is not possible to open linked pages on the top level button of a submenu. My linked page is still under construction, we are testing multiple themes und Krystal Business is our favourite at the moment. Would be nice if those bugs could be removed. I don’t know if they also appear in the pro version.
Seems like you have installed third-party plugins which might be causing jquery conflict. I suggest you to deactivate plugins (others than recommended ) one by one and then check again until you find that plugin which is causing this issue.
Plugins: Download Manager, Widgets on Pages, Torro forms etc.