cant play or connect to call of duty servers using nighthawk m5 and mk63 mesh system

Dang....

You mgiht set a static IP address on the MRs web page under Advanced tab/Internet. Change from DHCP to Static, input that IP address, Subnet mask would be 255.255.255.0 I believe, Gateway would be the M5 IP address seen on it's LAN side so maybe thats 192.168.1.1 or could 192.168.0.1. DNS you can use the M5s IP address on the LAN or use a custome DNS addresses. 

Or easiest would be to configure the MR for AP Mode then and use the M5 as your host router with its limited router features. 

https://kb.netgear.com/24104/How-do-I-change-my-Nighthawk-router-to-AP-mode-after-I-ve-already-run-setup