Warning: require_once(/var/www/html/wp-includes/widgets/class-wp-widget-recent-comments.php): Failed to open stream: Permission denied in /var/www/html/wp-includes/default-widgets.php on line 58

Fatal error: Uncaught Error: Failed opening required '/var/www/html/wp-includes/widgets/class-wp-widget-recent-comments.php' (include_path='.:/usr/local/lib/php') in /var/www/html/wp-includes/default-widgets.php:58
Stack trace:
#0 /var/www/html/wp-includes/functions.php(5453): require_once()
#1 /var/www/html/wp-includes/class-wp-hook.php(341): wp_maybe_load_widgets('')
#2 /var/www/html/wp-includes/class-wp-hook.php(365): WP_Hook->apply_filters('', Array)
#3 /var/www/html/wp-includes/plugin.php(522): WP_Hook->do_action(Array)
#4 /var/www/html/wp-settings.php(630): do_action('plugins_loaded')
#5 /var/www/html/wp-config.php(98): require_once('/var/www/html/w...')
#6 /var/www/html/wp-load.php(50): require_once('/var/www/html/w...')
#7 /var/www/html/wp-blog-header.php(13): require_once('/var/www/html/w...')
#8 /var/www/html/index.php(17): require('/var/www/html/w...')
#9 {main}
  thrown in /var/www/html/wp-includes/default-widgets.php on line 58