Menu options do not display with Medigroup theme

Hi,
We have a theme that modifies the WordPress menu builder with several options. We’ve confirmed this theme is preventing the User Menus plugin options from working. Here is the theme: https://themeforest.net/item/medigroup-a-modern-multidisciplinary-medical-health-theme/17191362#

Can you assist with resolving this conflict if we were to provide you with a copy of the theme? Is this something the theme author should address?

Thank you for your help!