Nighthawk Mesh MR60 - Fios box connection

[meyer6pack]

I recently had the Nighthawk router for my internet connection.   My service is Fios.  I would run the coax connection from my ONT into Moac adapter and then from the adapter into the router.  All was going well and then my router failed after 2 years.

I then purchased the nighthawk mesh system and it came up - all but one set top box.  The box is saying it cannot detect my router and that they cannot connect my media client to the router.

Fios as usual has mentioned I need their router.  But this has worked for me before.

Trying to figure if I have to tweak something.  The other 2 set top boxes are working fine.

I appreciate any information.