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

You get more information about the problem in our knowledge base: http://www.woltlab.com/help/?code=2013

Information:

error message: Connecting to MySQL server 'mysql4.sfvbm.de' failed.
error code: 2013
sql type: MySQLDatabase
sql error: Lost connection to MySQL server at 'reading initial communication packet', system error: 111
sql error number: 2013
sql version:
file: /kunden/237985_49324/webseiten/wbb/wcf/lib/system/database/MySQLDatabase.class.php (29)
php version: 5.2.17
wcf version: 1.0.11 pl 4 (Horizon)
date: Tue, 22 Oct 2019 14:34:00 +0000
request: /wbb/index.php?page=Help&s=185604f0087ca6c8b30931db9cc748ce0fb48754
referer:

Stacktrace:

#0 /kunden/237985_49324/webseiten/wbb/wcf/lib/system/database/Database.class.php(76): MySQLDatabase->connect()
#1 /kunden/237985_49324/webseiten/wbb/wcf/lib/system/WCF.class.php(270): Database->__construct(...)
#2 /kunden/237985_49324/webseiten/wbb/wcf/lib/system/WCF.class.php(88): WCF->initDB()
#3 /kunden/237985_49324/webseiten/wbb/global.php(18): WCF->__construct()
#4 /kunden/237985_49324/webseiten/wbb/index.php(7): require_once('/kunden/237985_...')
#5 {main}