MySQL error in file: /var/www/dreempics/data/www/dreempics.com/engine/modules/show.short.php at line 70

Error Number: 3685

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

SQL query:

SELECT id, autor, date, short_story, full_story, xfields, title, category, alt_name FROM dle_post WHERE category regexp '[[:<:]](4)[[:>:]]' AND approve=1 ORDER BY date DESC LIMIT 0,10