Hello,
1-5 Once we disabled Themesflat Addons For Elementor plugin problems were fixed. Clear all cache and check. You can contact the support of the plugin.
Please note that we do not give a guaranty for full theme compatibility with all existing 3rd party plugins. Sometimes, not always, you need additionally customize the theme or plugin to make them work together. Unfortunately, it’s not possible for the author to make the theme compatible with all the existing plugins and additional customization is outside the scope of our support.
Regards
One standard license is valid only for 1 project. Running multiple projects on a single license is a copyright violation.