SQL-DATABASE ERROR

Database error in (): Link-ID == false, connect failed
mysql error:
mysql error number:
mysql version: unknown
php version: 7.4.33
Date: 19.05.2024 @ 10:12
Script: /wbb2/register.php?sid=2fc7189f86c5d5b941219d2379e1b4b4
Referer: