Please deactivate all the plugins except these ones:
Slider Revolution
WPBakery Page Builder
Woodmart Core
Contact Form 7
MailChimp for WordPress
WooCommerce
Safe SVG
Switch to the parent theme and check if it appears.
If the problem has gone, activate the plugins one by one, checking the issue to detect which one causes the problem.
Go to Theme Settings > General > Mobile Bottom NavBar> Enable mobile bottom NavBar. Please check back your Site after completely clearing the browser and server cache.
If the issue remains Please share the WP admin login details of your site.