My guess would be that someone changed some security settings.
Fastest fix is to reload it.
But to find the issue, here is a good place to get you going
On our Nuvera 100 printer which uses the Sun Solaris OS, the "CRON" scheduler service keeps getting disabled every time the printer is restarted. This does not happen on our other two identical Nuvera 100 printers. Trying to find out what would keep disabling cron on this printer. Thanks