MySQL error in file: /engine/api/api.class.php at line 390

Error Number: 3685

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

SQL query:

Select id, category, title, alt_name, date from dle_post where category regexp "[[:<:]](0)[[:>:]]" AND approve = 1 AND date < "2021-09-21 19:24:12" order by date DESC limit 0,1000