Hi There @MarjorieSeignier
Thanks for writing in! Upon checking your site, I see that you have enabled under construction mode.
First inspect your sections/columns/elements and see whether they are not hidden for various device widths. You can follow our article here (https://theme.co/apex/forum/t/hide-during-breakpoint-explained/17378).
If you’re still having issues, then try enabling your WP_DEBUG mode on your WordPress (https://codex.wordpress.org/WP_DEBUG) and re-visit your page to see if you’re getting any PHP errors.
Further, you need to disable all of your 3rd party plugins and see if you’re experiencing a plugin conflict. If the issue is resolved, then you need to enable your plugins one by one to see which plugin causing the issue.
If you’re using a child theme, switch to your parent theme and see if your child theme customizations are causing this issue.
Let us know how it goes.
Thanks!