Here’s some ways you can trouble shoot the problem. There can be different reasons as to why your schedule is not operating.
1) If Your Schedule did not power on the group of bulbs, or only certain bulbs in a group powered on.
Check the configure scene settings for the group and make sure all bulbs are set to on.
2) If Your Schedule does not turn on and/or off any bulbs.
Possibly it was a bad schedule save, delete the schedule and recreate it and power the bulb on and off once to resync the time.
3) If your bulbs lost power and the schedule is no longer working.
If bulb(s) lose power (light switch powered off, or power outage), they will retain their schedules. However, bulbs will lose track of time (just like a microwave losing power), when power is restored to resync the time to the bulbs give it any command (Power Off) from the HomeBrite app.