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: 08.06.2024 @ 20:35
Script: /wbb2/index.php/banner/board.php?boardid=111%3Fsid%3Da8deddb29ffcc11841a8f0162850beee
Referer: http://friendsbistro.de/wbb2/index.php/banner/board.php?boardid=111%3Fsid%3Da8deddb29ffcc11841a8f0162850beee