Try this step-by-step guide to resolve the problem.
A red LED indicates that the Hub is no longer connected to the local network.
The Hub checks the internet each night for a time update. Schedules should activate according to the Hub's last known time, but could drift over time.
In the shade's Advanced Settings activate the Sync Shade Memory command in order to restore correct scene information.
If the scene used in the schedule is working, try creating a new test schedule for five minutes out.
If that one works, delete the schedule that failed and recreate a new one.
iOS:
While using the App navigate to Settings → PowerView → Location → Toggle on Precise Location for best accuracy.
Android:
Navigate to Settings → Apps → PowerView → Permissions → Location → Allow all the time (recommended) or Allow only while using the App.