Fatal error: Uncaught Doctrine\DBAL\Driver\Mysqli\Exception\ConnectionFailed: Connection refused in /homepages/38/d16578912/htdocs/Gym-Veldenz/typo3cms/projekt2017upgrade2021/vendor/doctrine/dbal/lib/Doctrine/DBAL/Driver/Mysqli/Exception/ConnectionFailed.php:19 Stack trace: #0 /homepages/38/d16578912/htdocs/Gym-Veldenz/typo3cms/projekt2017upgrade2021/vendor/doctrine/dbal/lib/Doctrine/DBAL/Driver/Mysqli/MysqliConnection.php(81): Doctrine\DBAL\Driver\Mysqli\Exception\ConnectionFailed::new() #1 /homepages/38/d16578912/htdocs/Gym-Veldenz/typo3cms/projekt2017upgrade2021/vendor/doctrine/dbal/lib/Doctrine/DBAL/Driver/Mysqli/Driver.php(17): Doctrine\DBAL\Driver\Mysqli\MysqliConnection->__construct() #2 /homepages/38/d16578912/htdocs/Gym-Veldenz/typo3cms/projekt2017upgrade2021/vendor/doctrine/dbal/lib/Doctrine/DBAL/Connection.php(411): Doctrine\DBAL\Driver\Mysqli\Driver->connect() #3 /homepages/38/d16578912/htdocs/Gym-Veldenz/typo3cms/projekt2017upgrade2021/public/typo3/sysext/core/Classes/Database/Connection.php(101): Doctrine\DB in /homepages/38/d16578912/htdocs/Gym-Veldenz/typo3cms/projekt2017upgrade2021/vendor/doctrine/dbal/lib/Doctrine/DBAL/Driver/AbstractMySQLDriver.php on line 112