Fatal error: Connecting to MySQL server 'rdbms.strato.de' failed.

You get more information about the problem in our knowledge base: http://www.woltlab.com/help/?code=2059

Information:

error message: Connecting to MySQL server 'rdbms.strato.de' failed.
error code: 2059
sql type: MySQLDatabase
sql error: Authentication plugin 'mysql_clear_password' cannot be loaded: plugin not enabled
sql error number: 2059
sql version:
file: /mnt/web019/d1/58/51859358/htdocs/Forum/wcf/lib/system/database/MySQLDatabase.class.php (29)
php version: 7.3.31
wcf version: 1.0.11 pl 1 (Horizon)
date: Sat, 27 Nov 2021 15:14:08 +0000
request: /index.php?page=Board&boardID=22&s=e1cff65af43eaeeea0a0a454444fbf0a8ba19e99
referer:

Stacktrace:

#0 /mnt/web019/d1/58/51859358/htdocs/Forum/wcf/lib/system/database/Database.class.php(76): MySQLDatabase->connect()
#1 /mnt/web019/d1/58/51859358/htdocs/Forum/wcf/lib/system/WCF.class.php(270): Database->__construct(...)
#2 /mnt/web019/d1/58/51859358/htdocs/Forum/wcf/lib/system/WCF.class.php(88): WCF->initDB()
#3 /mnt/web019/d1/58/51859358/htdocs/Forum/global.php(18): WCF->__construct()
#4 /mnt/web019/d1/58/51859358/htdocs/Forum/index.php(7): require_once('/mnt/web019/d1/...')
#5 {main}