Mobile Menu Icon Missing

When viewing the site on mobile, or viewing using mobile view in customisation,the menu icon does not appear. Additionally, there is no icon next to the phone number either and this happens on desktop also.

Any assistance you can provide would be greatly appreciated.I’d really like to purchase the premium version of this theme but unless I am able to resolve this issue I won’t be able to. Thanks

The page I need help with: [log in to see the link]