Looks like your settings need to be adjusted. You have Apple iCloud+ Private Relay enabled, which hides your IP address.
This prevents you from streaming the event audio. You'll need to disable it for this event's Wi-Fi network to listen.
For iOS users...
- Open Settings and tap Wi-Fi.
- Next to the event Wi-Fi, tap the
More Info button.
- Scroll down and disable Limit Ip Address Tracking.
For macOS users...
- Open System Preferences and click Wi-Fi.
- Click Details... next to the event WiFi.
- Uncheck Limit IP Address Tracking.