Advertised ospf routes in a HUB->Spoke Topology (SSR) does not have a correct Next HOP in FIB entries.

In a HUB Spoke topology, the Spoke does not have a correct NH in FIb entry due to the route learnt by OSPF and its administrative distance of default "110", the route becomes unavailable.

Note :- An OSPF administrative distance route can become unavailable if another routing protocol with a lower administrative distance (AD) learns a route to the same destination,

Create static route in the Spoke side pointing to correct Gw (it should be NH as peer path of HUB router).

This will help to create Next Hop in FIB entries.