Added the new admin notice warning about disabled REST API on the backend, which is required to WPML works correctly.
Fixes
Fixed availability of REST API in a default language when a site has “Language URL format” set to “Different languages in directories” and “Use directory for default language” option is checked.
Compatibility
Added translation support to Elementor’s popup.
Adjusted styles of Language metabox in Post edit screen to match WordPress 5.3 styling.