Warning: session_start(): Failed to read session data: user (path: ) in /var/www/html/ojs-3.3.0-17/lib/pkp/classes/session/SessionManager.inc.php on line 60

Fatal error: Uncaught PDOException: SQLSTATE[08004] [1040] Too many connections in /var/www/html/ojs-3.3.0-17/lib/pkp/lib/vendor/doctrine/dbal/lib/Doctrine/DBAL/Driver/PDOConnection.php:38 Stack trace: #0 /var/www/html/ojs-3.3.0-17/lib/pkp/lib/vendor/doctrine/dbal/lib/Doctrine/DBAL/Driver/PDOConnection.php(38): PDO->__construct('mysql:host=revi...', 'root', 'secret', Array) #1 /var/www/html/ojs-3.3.0-17/lib/pkp/lib/vendor/laravel/framework/src/Illuminate/Database/Connectors/Connector.php(67): Doctrine\DBAL\Driver\PDOConnection->__construct('mysql:host=revi...', 'root', 'secret', Array) #2 /var/www/html/ojs-3.3.0-17/lib/pkp/lib/vendor/laravel/framework/src/Illuminate/Database/Connectors/Connector.php(46): Illuminate\Database\Connectors\Connector->createPdoConnection('mysql:host=revi...', 'root', 'secret', Array) #3 /var/www/html/ojs-3.3.0-17/lib/pkp/lib/vendor/laravel/framework/src/Illuminate/Database/Connectors/MySqlConnector.php(24): Illuminate\Database\Connectors\Connector->createConnection('mysql:host=revi...', Array, in /var/www/html/ojs-3.3.0-17/lib/pkp/lib/vendor/laravel/framework/src/Illuminate/Database/Connection.php on line 671