Error connecting to database - check your database connection properties in constants.php file

SQLSTATE[08004] [1040] Too many connections
PHP Version : 5.6.40
Error connecting to database - check your database connection properties in constants.php file

SQLSTATE[08004] [1040] Too many connections
PHP Version : 5.6.40

Catchable fatal error: Argument 1 passed to Configs::__construct() must be an instance of PDO, null given, called in /home/gistana/public_html/admin/includes/Session.php on line 35 and defined in /home/gistana/public_html/admin/includes/Configs.php on line 9