DEVilador
Can you set your Default Log Level to DEBUG in osTicket system settings, run cron, and check your osTicket system logs to see if you see a new entry for Cron Executed? If you see this then that means it's working. You can also try to run it manually to see if it outputs any errors, etc.
You also need to upgrade to v1.17.2 and install the latest builds of any plugins you have currently installed.
Cheers.