Troubleshooting

UI connection issues

Flex populates the UI with data retrieved from the back-end service via websockets.

If your browser is unable to make a websocket connection to the Flex service you will see the error:

Connection lost. Retrying in 5 seconds.

The most common cause of this error is a reverse-proxy between your machine and the Flex back-end service that has not been configured to allow websocket traffic. Firewalls may also block this traffic.

See our guide to configuring a reverse-proxy to allow websocket traffic here: Deployment notes