Hello,
1) Create footer using Static Blocks if you want to have the columns layout https://youtu.be/KWAQRXZXsaw
https://8theme.com/demo/docs/royal/Plugins/WPBakery_Page_Builder_Settings
2) Disable the Nasa Core plugin. Provide us with temporary WP Dashboard and FTP access to your site to check the issue if it does not help.
Regards