Hello, @Halo Robotics,
I have checked your site and the theme was already installed and activated on your site. I disable the plugin “Elementor Header & Footer” after that I checked your issue.
By disabling the plugin the menu appears fine on the backend Dashboard >> Appearance >> Menus
By disabling the plugin on the site, the frontend menu appears just fine there is no issue.
I have made a video for you please watch it complete for a better reference: https://streamable.com/px8zcn
Regards 8Themes Team.