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 * from ero_post where (category regexp "[[:<:]](31)[[:>:]]") AND approve = 1 AND date < "2025-07-09 01:14:01" AND id != 4292 AND id > 4292 order by id ASC limit 0,3