Notifications with Jobs and Cron

[gianfachini]

Hi everyone, I'm using EspoCRM for my enterprise, which was installed via Softaculous, and I want to implement a notification system where files have a validity field. This field needs to be checked daily, and if any file's validity is less than 30 days, an alert and notification should be triggered for the users. I tried to implement this using Jobs and scheduled tasks, but it isn't working, and unfortunately, we don't have the resources to purchase the Workflow module. If anyone knows a way to accomplish this, I would greatly appreciate it. Thanks in advance!