Thanks for asking.
I tried opening your website that's attached in your licence manager page but it's asking for login details. Can you please share login details in a secure note with us so we can take a closer look?
In the mean time, please try removing any custom CSS and JS code. Can you please confirm wether or not you have Superfly menu installed on the website as does has hamburger menu function? If yes, please uninstall the same and see how it goes.