This device number is already occupied by a different monitor, please enter the URL of a different device for this monitor.
Please use this URL only on one monitor at the same time.
If this is the right monitor for this URL please follow these steps:
1) navigate to Devices
2) edit this device
3) press the button "Allow other device to use this URL"
4) refresh this page on this monitor/browser or restart the monitor

If this problem persists, make sure that your browser supports cookies and does not delete them upon restart.

An error occured.