Your hub is in WPS mode

Home Hub 4 and 5 - Flashing Orange Wireless Light 

How to fix problem:

Press the Wi-Fi Protected Setup (WPS) button on your hub to reconnect. Do this within two minutes of your hub flashing.
If you have a WPS button on your computer or device also press this.

Your hub will return to normal mode with no flashing light after a few minutes. If your hub flashes red you didn't reconnect -
give it a few minutes and try again.

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