SQL-DATABASE ERROR

Database error in WoltLab Burning Board (): Link-ID == false, connect failed
mysql error: Can't connect to MySQL server on 'database-5004055859.webspace-host.com' (111)
mysql error number: 2003
mysql version: unknown
php version: 5.3.29
Date: 03.05.2024 @ 09:31
Script: /register.php?sid=f480830f495e555d4e10f6fa9a889b9a
Referer: