Fatal error: Uncaught Error: Class 'PDO' not found in /var/www/journal/lib/pkp/lib/vendor/laravel/framework/src/Illuminate/Database/Capsule/Manager.php:49 Stack trace: #0 /var/www/journal/lib/pkp/lib/vendor/laravel/framework/src/Illuminate/Database/Capsule/Manager.php(37): Illuminate\Database\Capsule\Manager->setupDefaultConfiguration() #1 /var/www/journal/lib/pkp/classes/core/PKPApplication.inc.php(209): Illuminate\Database\Capsule\Manager->__construct() #2 /var/www/journal/lib/pkp/classes/core/PKPApplication.inc.php(169): PKPApplication->initializeDatabaseConnection() #3 /var/www/journal/lib/pkp/includes/bootstrap.inc.php(41): PKPApplication->__construct() #4 /var/www/journal/index.php(65): require('/var/www/journa...') #5 {main} thrown in /var/www/journal/lib/pkp/lib/vendor/laravel/framework/src/Illuminate/Database/Capsule/Manager.php on line 49