Things to try:
- Please make sure your projector is turned on. This error may display if your projector has gone into standby mode or if it is not on.
- Update your device firmware. You may also get this error if your firmware is not up to date. Please make sure you are connected to the internet to see if your firmware needs to be updated. If you need a firmware update, you will be prompted to update the firmware once your device is online.