Fatal error: Connecting to MySQL server 'mysql4.stachelblume.de' failed.

You get more information about the problem in our knowledge base: http://www.woltlab.com/help/?code=2002

Information:

error message: Connecting to MySQL server 'mysql4.stachelblume.de' failed.
error code: 2002
sql type: MySQLDatabase
sql error: Connection refused
sql error number: 2002
sql version:
file: /kunden/246726_52249/webseiten/Forum/WCFSetup/install/files/lib/system/database/MySQLDatabase.class.php (29)
php version: 5.4.45
wcf version: 1.0.11 pl 1 (Horizon)
date: Wed, 13 Nov 2019 14:33:16 +0000
request: /Forum/WCFSetup/install/index.php?page=User&userID=3890
referer:

Stacktrace:

#0 /kunden/246726_52249/webseiten/Forum/WCFSetup/install/files/lib/system/database/Database.class.php(76): MySQLDatabase->connect()
#1 /kunden/246726_52249/webseiten/Forum/WCFSetup/install/files/lib/system/WCF.class.php(270): Database->__construct(...)
#2 /kunden/246726_52249/webseiten/Forum/WCFSetup/install/files/lib/system/WCF.class.php(88): WCF->initDB()
#3 /kunden/246726_52249/webseiten/Forum/WCFSetup/install/global.php(18): WCF->__construct()
#4 /kunden/246726_52249/webseiten/Forum/WCFSetup/install/index.php(7): require_once('/kunden/246726_...')
#5 {main}