MySQL error in file: /engine/modules/show.full.php at line 994

Error Number: 3685

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

SQL query:

SELECT id, date, short_story, xfields, title, category, alt_name FROM dle_post WHERE category regexp '[[:<:]](5)[[:>:]]' AND MATCH (title, short_story, full_story, xfields) AGAINST ('[MAX] Netskirts05_S03_Chastitylynn_Anitadark_480P - 1.3 GB ') AND id != 1076691 AND approve=1 LIMIT 8