Notifications cancelled means a message, alert, or reminder was stopped before it could be sent. This can happen on purpose or because a system setting, permission, or delivery rule changed.
Alerts may be cancelled if the app is muted, the user turns off notifications, the device is offline, or a schedule ends. In some cases, updates or account changes can also stop future notices.
Review your notification settings, device permissions, and any quiet hours or filters. If you still need alerts, turn notifications back on and test again.