SQL-DATABASE ERROR

Database error in WoltLab Burning Board: Link-ID == false, connect failed
mysql error: Too many connections
mysql error number: 1040
Date: 25.05.2024 @ 11:26
Script: /usercp.php?action=addsubscription&threadid=5635&sid=f99eae227226bf71f30ed587f50faa12
Referer: