What could be the problem that the tinyMCE editor does not process custom styles in the editor?

Question

TinyMCE

editor-style.css created.
tried to code

function my_theme_add_editor_styles() {
  add_editor_style( 'editor-styles.css' );
}
add_action( 'current_screen', 'my_theme_add_editor_styles' );

and in functions.php and theme_functions.php does not help.
How do you understand what the problem is - the editor does not see the styles or sees but does not work out?

Answer 1

add_action( 'after_setup_theme', 'my_theme_add_editor_styles' );
function my_theme_add_editor_styles() {
  add_editor_style( 'editor-style.css' );
}

it's probably a hook