SQL-DATABASE ERROR

Database error in WoltLab Burning Board (): Link-ID == false, connect failed
mysql error:
mysql error number:
mysql version: unknown
php version: 7.2.34-36+ubuntu18.04.1+deb.sury.org+1
Date: 08.05.2025 @ 21:33
Script: /forum/usercp.php?action=buddy&add=21243
Referer: