PFSense - Router Modem Port - Too Many redirects / DNS Probe Failed BAD Config

[SmartCodar]

Hi,

Here is my PFSense Box and Router Setup

PFSense Box gets WAN IP From DHCP (From ISP)
PFSense Box -> With DHCP Enabled -> LAN is Connected to -> Router on MODEM Port -> With DHCP Enabled on Clients
ALL Connected Devices gets IP from Router (Dynamic IP)

1. PFSense Allocated Dynamic IP to Router
2.Router has its own DHCP Server Enabled
3.All Devices gets IP from Router

Issue:
1.I have error DNS Probe Failed. Bad Config
2.If I write a Port Forwarding Rule in NAT this causes error too may redirects

Note:
PFSense Box has Internet Access
Router is Connected to PFSense LAN Port using Modem Port
Basic Requirement is Devices Should get IP from Router and not from PFSense (In some cases)

Can someone share an example or Provide resolution for above?

Sincere Thanks