To expand on this in case anyone else comes across this post- we had only one post that was “sticky”. The theme does not display the slideshow on the mobile view if there is only one slide in it. The fix was to add more sticky posts, forcing the slideshow to display, which made the menu work.
We didn’t resolve whatever the actual conflict was, but that did make the site work.
OK I just sent you an email again right now. It has the URL and a username/password for you to use.
The issue is that the menu does not expand when you click on the menu icon on the home page if the page is loaded on a mobile browser or even on a desktop browser in the mobile view (less than 750 px wide). It works on all other pages. It also works if you load in a desktop browser then shrink the page.
If it doesn’t come through please email me at my user name for this site at gmail.