Cron Error: auto_etsy_order_hook invalid_schedule

My cron shows this error:

Cron-Reschedule-Event-Fehler f??r Hook: auto_etsy_order_hook, Fehlercode: invalid_schedule, Fehlermeldung: Die Ereignisplanung existiert nicht., Daten: {“schedule”:”five_min”,”args”:[],”interval”:300}

I already deactivated and activated the plugin and saved the settings again. But the error is still there.