Fatal error: Uncaught PDOException: SQLSTATE[HY000] [2002] Resource temporarily unavailable in /var/www/html/include/config.php:21
Stack trace:
#0 /var/www/html/include/config.php(21): PDO->__construct()
#1 /var/www/html/include/config.php(55): ConfigClass->__construct()
#2 /var/www/html/index.php(5): include('...')
#3 {main}
thrown in /var/www/html/include/config.php on line 21