MySQL error in file: /engine/modules/functions.php at line 1587

Error Number: 2006

The Error returned was:
MySQL server has gone away

SQL query:

SELECT p.id, p.autor, p.date, p.short_story, CHAR_LENGTH(p.full_story) as full_story, p.xfields, p.title, p.category, p.alt_name, p.comm_num, p.allow_comm, p.fixed, p.tags, e.news_read, e.allow_rate, e.rating, e.vote_num, e.votes, e.view_edit, e.editdate, e.editor, e.reason FROM smartzone_post p INNER JOIN (SELECT DISTINCT(smartzone_post_extras_cats.news_id) FROM smartzone_post_extras_cats WHERE cat_id IN ('2','3','5','6','7','8')) c ON (p.id=c.news_id) LEFT JOIN smartzone_post_extras e ON (p.id=e.news_id) WHERE p.date >= '2019-04-22 03:19:01' - INTERVAL 400 DAY AND p.date < '2019-04-22 03:19:01' AND approve=1 ORDER BY RAND() LIMIT 0,3