Divi not working on mobile devices

For the last couple of days my site has looked very odd, with an almost blank home page (individual posts are OK). I updated Divi this morning and hoped it would solve the problem. It seems to be OK on the desktop now but on the mobile I just get one link followed by lots of blank space. And the navigation menu isn’t working.

Has anyone else had this problem? Any ideas how I can fix it?

Thanks.