Koha error

The following fatal error has occurred:

Unmatched [ in regex; marked by <-- HERE in m/[ <-- HERE et/ at /usr/share/koha/lib/C4/Search.pm line 1320.
Apache Server version: Apache/2.2.9 (Debian) Server built: Feb 5 2012 21:05:11
Koha 3.00.02.012
Koha DB 3.0002012
MySQL mysql Ver 14.12 Distrib 5.0.51a, for debian-linux-gnu (i486) using readline 5.2
OS Linux koha-sino-575f9cdd65-kbbfb 5.15.0-131-generic #141-Ubuntu SMP Fri Jan 10 21:18:28 UTC 2025 x86_64
Perl 5.010000