Mobile menu not working

I built my site locally using Studio theme, and everything works perfectly. When I uploaded to my host (using the same version of WordPress, 4.8.1), the mobile menu stopped functioning. No menu options appear when I click on the hamburger, and nothing happens. I've already tried clearing my cache on both Chrome and Safari, deactivated my only plugin, Ninja Forms 3, and also reverted all settings, but the problem is still happening. It also happens on my iPhone 5. www.claudineguertin.com/ Thanks in advance for your help!