ngs keys for each widget.
	*/
	public function get_widgets_frontend_settings_keys() {
		$keys = [];

		foreach ( $this->get_widget_types() as $widget_type_name => $widget_type ) {
			$widget_type_keys = $widget_type->get_frontend_settings_keys();

			if ( $widget_type_keys ) {
				$keys[ $widget_type_name ] = $widget_type_keys;
			}
		}

		return $keys;
	}

	/**
	 * Enqueue widgets scripts.
	 *
	 * Enqueue all the scripts defined as a dependency for each widget.
	 *
	 * @since 1.3.0
	 * @access public
	*/
	public function enqueue_widgets_scripts() {
		foreach ( $this->get_widget_types() as $widget ) {
			$widget->enqueue_scripts();
		}
	}

	/**
	 * Enqueue widgets styles
	 *
	 * Enqueue all the styles defined as a dependency for each widget
	 *
	 * @access public
	 */
	public function enqueue_widgets_styles() {
		foreach ( $this->get_widget_types() as $widget ) {
			$widget->enqueue_styles();
		}
	}

	/**
	 * Retrieve inline editing configuration.
	 *
	 * Returns general inline editing configurations like toolbar types etc.
	 *
	 * @access public
	 * @since 1.8.0
	 *
	 * @return array {
	 *     Inline editing configuration.
	 *
	 *     @type array $toolbar {
	 *         Toolbar types and the actions each toolbar includes.
	 *         Note: Wysiwyg controls uses the advanced toolbar, textarea controls
	 *         uses the basic toolbar and text controls has no toolbar.
	 *
	 *         @type array $basic    Basic actions included in the edit tool.
	 *         @type array $advanced Advanced actions included in the edit tool.
	 *     }
	 * }
	 */
	public function get_inline_editing_config() {
		$basic_tools = [
			'bold',
			'underline',
			'italic',
		];

		$advanced_tools = array_merge( $basic_tools, [
			'createlink',
			'unlink',
			'h1' => [
				'h1',
				'h2',
				'h3',
				'h4',
				'h5',
				'h6',
				'p',
				'blockquote',
				'pre',
			],
			'list' => [
				'insertOrderedList',
				'insertUnorderedList',
			],
		] );

		return [
			'toolbar' => [
				'basic' => $basic_tools,
				'advanced' => $advanced_tools,
			],
		];
	}

	/**
	 * Widgets manager constructor.
	 *
	 * Initializing Elementor widgets manager.
	 *
	 * @since 1.0.0
	 * @access public
	*/
	public function __construct() {
		$this->require_files();

		add_action( 'elementor/ajax/register_actions', [ $this, 'register_ajax_actions' ] );
	}

	/**
	 * Register ajax actions.
	 *
	 * Add new actions to handle data after an ajax requests returned.
	 *
	 * @since 2.0.0
	 * @access public
	 *
	 * @param Ajax $ajax_manager
	 */
	public function register_ajax_actions( Ajax $ajax_manager ) {
		$ajax_manager->register_ajax_action( 'render_widget', [ $this, 'ajax_render_widget' ] );
		$ajax_manager->register_ajax_action( 'editor_get_wp_widget_form', [ $this, 'ajax_get_wp_widget_form' ] );
		$ajax_manager->register_ajax_action( 'get_widgets_config', [ $this, 'ajax_get_widget_types_controls_config' ] );

		$ajax_manager->register_ajax_action( 'get_widgets_default_value_translations', function ( array $data ) {
			return $this->ajax_get_widgets_default_value_translations( $data );
		} );
	}

	/**
	 * @param $experiment_name
	 * @param $classes
	 * @return void
	 */
	public function register_promoted_active_widgets( string $experiment_name, array $classes ) : void {
		if ( ! Plugin::$instance->experiments->is_feature_active( $experiment_name ) || empty( $classes ) ) {
			return;
		}

		foreach ( $classes as $class_name ) {
			$this->register( new $class_name() );
		}
	}
}
<br />
<b>Fatal error</b>:  Uncaught Error: Class 'Elementor\Widgets_Manager' not found in /home/rahjooian/public_html/wp-content/plugins/elementor/includes/plugin.php:718
Stack trace:
#0 /home/rahjooian/public_html/wp-content/plugins/elementor/includes/plugin.php(647): Elementor\Plugin-&gt;init_components()
#1 /home/rahjooian/public_html/wp-includes/class-wp-hook.php(324): Elementor\Plugin-&gt;init('')
#2 /home/rahjooian/public_html/wp-includes/class-wp-hook.php(348): WP_Hook-&gt;apply_filters(NULL, Array)
#3 /home/rahjooian/public_html/wp-includes/plugin.php(517): WP_Hook-&gt;do_action(Array)
#4 /home/rahjooian/public_html/wp-settings.php(643): do_action('init')
#5 /home/rahjooian/public_html/wp-config.php(168): require_once('/home/rahjooian...')
#6 /home/rahjooian/public_html/wp-load.php(50): require_once('/home/rahjooian...')
#7 /home/rahjooian/public_html/wp-blog-header.php(13): require_once('/home/rahjooian...')
#8 /home/rahjooian/public_html/index.php(17): require('/home/rahjooian...')
#9 {main}
  thrown in <b>/home/rahjooian/public_html/wp-content/plugins/elementor/includes/plugin.php</b> on line <b>718</b><br />