The connected Wi-Fi clients are not displayed in Nebula CC

Zyxel_JoyLee

One of the most common reasons for a sudden loss of the active client list (while Wi-Fi services themselves continue to function normally) is an NTP/System Time Synchronization issue on the Access Points.
If an AP cannot sync its system time with the NTP server (for example, if UDP port 123 is blocked on your router/firewall, or due to a temporary DNS issue), the system time on the AP will drift. Because of this incorrect system time, Nebula cannot properly display real-time client status or current station information.

Please verify if the APs can successfully resolve DNS and sync with the NTP server (e.g., `*.pool.ntp.org` or `time.google.com`).