MySQL error in file: /engine/modules/show.short.extended.php at line 66

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 sht_post p LEFT JOIN sht_post_extras e ON (p.id=e.news_id) WHERE date BETWEEN '2018-02-01 00:00:00' AND '2018-02-28 23:59:59' AND category regexp '[[:<:]](2|3|4|5|6|7|8|10|11|12)[[:>:]]' AND approve = 1 ORDER BY date DESC LIMIT 36,6