Found a fix, it appears that the problem is from the log file. It points to itself in a loop. After deleting the log file and creating a new one, it all works.
OSError: [Errno 62] Too many levels of symbolic links: '/var/ossec/logs/active-responses.log'
root@OPNsense:~ # ls -l /var/ossec/logs/active-responses.log
lrwxr-x--- 1 root wazuh 36 Jun 30 13:59 /var/ossec/logs/active-responses.log -> /var/ossec/logs/active-responses.log
root@OPNsense:~ #
root@OPNsense:~ #
root@OPNsense:~ # rm /var/ossec/logs/active-responses.log
root@OPNsense:~ # touch /var/ossec/logs/active-responses.log
root@OPNsense:~ # chmod 750 /var/ossec/logs/active-responses.log
OSError: [Errno 62] Too many levels of symbolic links: '/var/ossec/logs/active-responses.log'
root@OPNsense:~ # ls -l /var/ossec/logs/active-responses.log
lrwxr-x--- 1 root wazuh 36 Jun 30 13:59 /var/ossec/logs/active-responses.log -> /var/ossec/logs/active-responses.log
root@OPNsense:~ #
root@OPNsense:~ #
root@OPNsense:~ # rm /var/ossec/logs/active-responses.log
root@OPNsense:~ # touch /var/ossec/logs/active-responses.log
root@OPNsense:~ # chmod 750 /var/ossec/logs/active-responses.log