MySQL error in file: /engine/modules/functions.php at line 1558

Error Number: 3685

The Error returned was:
Illegal argument to a regular expression.

SQL query:

SELECT p.id, p.date, p.short_story, p.xfields, p.title, p.category, p.alt_name FROM dle_post p LEFT JOIN dle_post_extras e ON (p.id=e.news_id) WHERE category regexp '[[:<:]](4)[[:>:]]' AND p.approve=1 AND p.date >= '2024-04-27 13:58:48' - INTERVAL 1 MONTH AND p.date < '2024-04-27 13:58:48' ORDER BY rating DESC, comm_num DESC, news_read DESC, date DESC LIMIT 10