Fatal error: Link-ID == false, Verbindung fehlgeschlagen

Error Message: Link-ID == false, Verbindung fehlgeschlagen
Error Code: 2002
SQL Type: Database
SQL Error: Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (111)
SQL Error Number: 2002
SQL Version:
File: /var/www/web2/htdocs/erostar/verzeichnis/lib/database/Database.class.php (76)
PHP Version: 5.6.40-0+deb8u12
GUI Version: 2.6.0
DB Build: 1058
Date: Tue, 28 May 2024 10:47:17 +0000
Request: /index.php
Referer:

Stacktrace:

#0 /var/www/web2/htdocs/erostar/verzeichnis/lib/database/Database.class.php(60): Database->connect()
#1 /var/www/web2/htdocs/erostar/verzeichnis/lib/database/Database.class.php(516): Database->__construct(...)
#2 /var/www/web2/htdocs/erostar/verzeichnis/acp/inc/init2.php(107): require_once('/var/www/web2/h...')
#3 /var/www/web2/htdocs/erostar/verzeichnis/global2.php(35): require_once('/var/www/web2/h...')
#4 /var/www/web2/htdocs/erostar/verzeichnis/index.php(10): require_once('/var/www/web2/h...')
#5 {main}