ข้อผิดพลาด Uncaught Error: Call to undefined function WPMLBlockEditor::wp_enqueue_block_style()

Uncaught Error: Call to undefined function WPMLBlockEditor::wp_enqueue_block_style() in /wp-content/plugins/sitepress-multilingual-cms/classes/block-editor/Loader.php:97

public function maybeEnqueueNavigationBlockStyles() {
	global $wp_version;
	if ( version_compare($wp_version, '5.9.0' ) >= 0) {
		if ( ! wp_style_is( 'wp-block-navigation', 'enqueued' ) || ! wp_style_is( 'wp-block-navigation', 'queue' ) ) {
			wp_enqueue_block_style( LanguageSwitcher::BLOCK_LANGUAGE_SWITCHER, [
				'handle' => 'wp-block-navigation'
			] );
		}
	}
}