jailkit + chroot cron not working
 

To recreate the problem:
1. create a site
2. add a chroot cron job to that site

In the auth.log see error:
Jul 24 16:31:40 web2 jk_chrootsh[32617]: abort, path /var/www/clients/client15/web30/./home/web30 does not have group owner 1012, set option 'relax_home_group' to relax this check

fix problem:
chown web30:client15 /var/www/clients/client15/web30/./home/web30

In auth.log see that issues is fixed:
Jul 24 16:40:01 web2 jk_chrootsh[398]: now entering jail /var/www/clients/client15/web30 for user web30 (1012) with arguments -c /usr/bin/wget -k ............


I think that somewhere in cron_jailkit_plugin.inc.php there should be a chown to make the permissions correct.

Thanks for the report. I've added it to the bugtracker.

Which Linux distribution do you use and which ISPConfig version, as chrooted cronjobs work on my systems with ISPConfig 3.0.3.3