DNS_PROBE_FINISHED_NXDOMAIN and Netgear Armor not activating (code: ARM-PYMT-EXP)

I have been having the same DNS issues with the latest firmware. My suggestion to you would be to upgrade to a firmware before the problem started to happen.

I'm currently running firmware V1.0.4.28_10.1.54 which is quite older but the one before Armor was released that gives me much better performance without bugs of the newer firmwares.

When you say "For the DNS error if you change it from the automatic settings to Primary DNS 8.8.8.8 and Secondary DNS 8.8.4.4 wont make a diffrence. Some poeple said it will fix it but it doesn't. "

Do you mean you changed the DNS settings inside the router to 8.8.8.8 , 8.8.4.4?. This will not fix the problem. Reason why is the devices connected will still get a primary DNS with an IP that is of your router.

The only way the DNS change works if you change it on each device connected to the router. I'm currently testing on my second r8000 that has the latest firmware. Wih my firefox using cloudflare dns, there are no dns issues. If I use DNS provided by router, DNS issue occurs.

I really don't think you will find a fix until they provide a new firmware update and the only thing you can do is bypass router DNS. If you find one let me know because I've tested a lot of different settings and options with multiple factory resets and I couldn't find one.