First install and enable LitelloLPCron.
Start at your ILIAS root directory
mkdir -p Customizing/global/plugins/Services/Cron/CronHook
cd Customizing/global/plugins/Services/Cron/CronHook
git clone https://gitblit.minervis.com/summary/GZ/LitelloLPCron.git LitelloLPCron
Update and activate the plugin in the ILIAS Plugin Administration
- ILIAS 5.4 or ILIAS 6
- PHP >=7.0