Check the Internet connection of the hub. If the status LED is not BLUE, please replug the power cable or reconnect the hub to your router.
If your hub is connected via Wi-Fi and you recently relocated it, try to move the hub closer to the router, or AP.
If you recently relocated your AP or routers. Try to move them back to their original places.
Try to set it up again, then update it to the latest firmware.
If the above steps cannot solve the problem, feel free to contact us via firstname.lastname@example.org.