Not arming on night schedule with automation programming?
I am seeing a few Panel Arming Failed events in history correlating to the arming times specified for arming schedules. Failure can be caused by open zones during this scheduled arming time. Were any zones that are left open at that time? Are you able to send remote commands to arm the system?
You may want to try a full powercycle (transformer first, then battery, wait 2 minutes then power back up battery first then transformer) And let the rule run again. Any Change?