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: 14.05.2024 @ 00:10
Script: /wbb2/pms.php?sid=4ebc46e7b662a16de10117f2a54d4ab0
Referer: