Fatal error: Uncaught PDOException: could not find driver in /srv/data/www/oauth2/oauth2-server-php/vendor/bshaffer/oauth2-server-php/src/OAuth2/Storage/Pdo.php:53 Stack trace: #0 /srv/data/www/oauth2/oauth2-server-php/vendor/bshaffer/oauth2-server-php/src/OAuth2/Storage/Pdo.php(53): PDO->__construct() #1 /srv/data/www/oauth2/oauth2-server-php/server.php(16): OAuth2\Storage\Pdo->__construct() #2 /srv/data/www/oauth2/oauth2-server-php/token.php(3): require_once('...') #3 {main} thrown in /srv/data/www/oauth2/oauth2-server-php/vendor/bshaffer/oauth2-server-php/src/OAuth2/Storage/Pdo.php on line 53