Thanks for writing in! I can see some JS error on your console that preventing the script. You could try testing for a plugin conflict. You can do this by deactivating all third party plugins, and seeing if the problem remains. If it’s fixed, you’ll know a plugin caused the problem, and you can narrow down which one by reactivating them one at a time.
Upon checking your site, I see custom jQuery script in your Customizer that is generating an error on your front page, try removing the code and check your site again.