MySQL error in file: /home/Drop/web/droid-mob.com/public_html/engine/modules/show.short.php at line 65

Error Number: 1139

The Error returned was:
Got error 'empty (sub)expression' from regexp

SQL query:

SELECT id, autor, date, short_story, full_story, xfields, title, category, alt_name FROM dle_post WHERE category regexp '[[:<:]](|18|1|2|3|4|5|6|7|8|9|10|11|12|13|14|15|16|17)[[:>:]]' AND approve=1 AND date < '2025-05-09 10:46:24' ORDER BY date DESC LIMIT 0,500