MySQL error in file: /engine/modules/coronavirus_table.php at line 47

Error Number: 2006

The Error returned was:
MySQL server has gone away

SQL query:

SELECT * FROM `country` a LEFT JOIN `country_stat_by_day` b ON a.`id` = b.`country_id` WHERE b.date < '2021-01-22' AND `country_id` = '530' ORDER BY b.`date` DESC