You could try a pin reset on the hub, hold it in for 30 seconds and see if that comes back as this may be the easier way. (Unfortunately I've found it doesn't work 100% of the time,
If that fails you would need to plug a device such as a desktop or laptop in via ethernet cable into port 1 on the hub and go to 192.168.100.1 to access the hubs settings page and disable modem only mode from the settings in there.
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