MySQL error in file: /engine/modules/calendar.php at line 212

Error Number: 2006

The Error returned was:
MySQL server has gone away

SQL query:

SELECT DATE_FORMAT(date,'%b %Y') AS m_date, MAX(date) AS max, COUNT(id) AS cnt FROM dle_post WHERE approve=1 AND date < '2023-03-29 10:58:10' GROUP BY m_date ORDER BY max desc