Warning: require_once(/var/www/html/app/sync.php): Failed to open stream: No such file or directory in /var/www/html/app/config.php on line 32

Fatal error: Uncaught Error: Failed opening required '/var/www/html/app/sync.php' (include_path='.:/usr/local/lib/php') in /var/www/html/app/config.php:32 Stack trace: #0 /var/www/html/public/index.php(2): require_once() #1 {main} thrown in /var/www/html/app/config.php on line 32