Please, update your website to the latest version of the theme, disable third-party plugins and the child theme and send us your admin access so we can check what is wrong.
As we can see, all plugins are still enabled and the theme is not updated. Please, update it to the latest version and disable the plugins so we can check the problem.
We analyzed your site and found that the problem is caused by how you inserted the icon into this field, you cannot write tags, only icon classes. https://take.ms/WqYWm