There is something here you could try:
https://helpforum.sky.com/t5/Sky-TV/Error-Codes-on-Sky-Q-and-Glass/ba-p/4017045
Go to Settings - Setup - Network and select Reset followed by Confirm. When the box restarts press Select and then go to the closest connected Sky Q device (the main box or Booster) and press and hold its WPS button (far right) until it flashes amber.
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