The cause to this problem might be related to the device connection. You will have to check the network settings and cables in case if you're using a physical device to transmit data.
Open the application, then access its configuration instructions. Make sure to choose another COM/USB port in case it's using one. Sometimes other applications gain access to COM ports, making it impossible for communication with the device. If this procedure doesn't work, I recommend contacting the developers. They will provide additional information related to this problem.