SQL-DATABASE ERROR

Database error in WoltLab Burning Board (): Link-ID == false, connect failed
mysql error: Too many connections
mysql error number: 1040
mysql version: unknown
php version: 5.3.29
Date: 19.05.2024 @ 02:41
Script: /calendar.php?month=4&year=2024&sid=cac0912190e2995e01edb3c1f23dd624
Referer: