You have no permission for starting a second AirBox channel. Probably, you have purchased only one AirBox license

This is a licensing issue.

Each separate instance (channel) of AirBox is licensed separately. This means that if you need to run 2 AirBox instances (channels) at the same time, you need to purchase 2 AirBox licenses.

Please contact our Sales team for more information (sales@playboxtechnology.com).