What is your physical setup?
Is the Verizon FIOS Quantum Gateway the only device you use to get internet? Or do you have a separate modem?
Or is it coaxial cable to the Quantum Gateway which acts as a combination modem / router, then Ethernet cable from Quantum Gateway to Tablo?
If you in fact have only one device which is a modem / router combo, this thread will help.
https://community.tablotv.com/t/can-you-show-me-how-to-set-up-tablo-connect/