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: 03.06.2024 @ 15:16
Script: /wbb2/board.php?boardid=111%3Fsid%3Ddfa0ca51683e3059ccabc78aea33a80a
Referer: http://friendsbistro.de/wbb2/board.php?boardid=111%3Fsid%3Ddfa0ca51683e3059ccabc78aea33a80a