Fatal error: Connecting to MySQL server 'db1588.1und1.de' failed.

You get more information about the problem in our knowledge base: http://www.woltlab.com/help/?code=2005

Information:

error message: Connecting to MySQL server 'db1588.1und1.de' failed.
error code: 2005
sql type: MySQLDatabase
sql error: Unknown MySQL server host 'db1588.1und1.de' (-2)
sql error number: 2005
sql version:
file: /homepages/45/d282182546/htdocs/X-Sellers/Forum/wcf/lib/system/database/MySQLDatabase.class.php (29)
php version: 5.2.17
wcf version: 1.0.11 pl 1 (Horizon)
date: Mon, 26 Sep 2022 00:17:37 +0000
request: /
referer:

Stacktrace:

#0 /homepages/45/d282182546/htdocs/X-Sellers/Forum/wcf/lib/system/database/Database.class.php(76): MySQLDatabase->connect()
#1 /homepages/45/d282182546/htdocs/X-Sellers/Forum/wcf/lib/system/WCF.class.php(270): Database->__construct(...)
#2 /homepages/45/d282182546/htdocs/X-Sellers/Forum/wcf/lib/system/WCF.class.php(88): WCF->initDB()
#3 /homepages/45/d282182546/htdocs/X-Sellers/Forum/global.php(18): WCF->__construct()
#4 /homepages/45/d282182546/htdocs/X-Sellers/Forum/index.php(7): require_once('/homepages/45/d...')
#5 {main}