folowc

Yes,

but when I’m changing to clear Vogue Theme from my Vogue child Theme, again I can use text and visual editor. Does it necessarily mean I made mistakes in function.php using wp_editor()?

$settings = array( 'textarea_name'   => 'tresc_posta',
                                'editor_class'  => 'frontend-edytor-artykulow',
                                'textarea_rows' => 15,
                                'teeny' => true,
                                'quicktags' => true,
                                'media_buttons' => true,
                                );
                
                     
                
                wp_editor( '', 'editor_id', $settings );

When I’m deleting last line nothing changes on backend;

BIG thank you for this valuable answer!