dadylonglegs

facebook-awd/AWD_facebook.php is in..

plugins > editor > select plugin(FB AWD all in 1) > click facebook-awd/AWD_facebook.php under plugin files > ctrl+f and find ‘public function get_plugins_feed’

you’ll see what dannylin is talking about.
as for me, i’m not sure what’s this function for so i let it be and instead i hide or comment out the error displaying code which is found under this function: public function get_plugins_feed

…

/**
	 * Fetch Feed infos in admin side.
	 * Rss Feed $url
	 */
	 public function admin_get_feeds($widget_awd_rss)
	 {

		$rss = @fetch_feed( $widget_awd_rss['url'] );
		if ( is_wp_error($rss) ) {
			if ( is_admin() || current_user_can('manage_options') ) {
				/*$html .='<div class="rss-widget"><p>';
				printf(__('<strong>RSS Error</strong>: %s'), $rss->get_error_message());
				$html .= '</p></div>';*/
			}
		} elseif ( !$rss->get_item_quantity() ) {
			$rss->__destruct();
			unset($rss);
			return false;
		} else {
			$html .= '<div class="rss-widget">';
			$html .= $this->wp_widget_rss_output( $rss, $widget_awd_rss );
			$html .= '</div>';
			$rss->__destruct();
			unset($rss);
		}
	}