Forgot which version to start，In the upper right corner of Unifi AP Controller, a WebSocket connection error message will pop up，The guess should be because there is no Unifi gateway product，I didn't pay any attention to it。
Updated today Unifi AP Controller，I’d like to check on the Internet to see if I can close this message.，It turns out that there is now an option to close it directly。
◎ "Settings"-"User Interface"，Pull down the screen on the right to the "Data" category。
◎ Disable "Enable WebSocket Connection"。
【參考連結】
- Websocket connection error upon first login – every time | Ubiquiti Community
