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: 22.05.2024 @ 11:57
Script: /wbb2/hmportal.php?sid=8d712d0cdd47a394c612f5049a1729c2
Referer: