1/ Error from the browser console was fixed.
2/ https://prnt.sc/1re6ztx – contact your hosting provider and ask to increase this value.
3/Thanks for FTP access. What is path to the theme folder?
4/ As we can see, WPBakery and Elementor plugins are activated on your site. We would recommend you to disable one of them, because using 2 editors to edit same content will cause a mess. Every plugin loads own styles and scripts, it slows down site a bit.
