"routerlogin.net" keeps saying I must be connected to my router's WiFi

Hey everybody,

I'm hoping someone can assist me with this issue.  I just picked up a Nighthawk X8 and Arris SB6190 yesterday for my new townhouse.  I have Comcast Xfinity Blast internet (200Mbps DL, 12Mbps UL).  For some reason, whenever I try going to "routerlogin.net" or "192.168.1.1" on my network, I come to a page saying that I must be connected to my router's WiFi network in order to accss the UI.  However, I am connected through my router's WiFi... it's even popped up when I was hardwired to my router.

The funny thing is that when I disabled my antivirus (Avast! Internet Security), I was able to load into the Netgear Genie just fine.  However, on devices where i cannot disable an antivirus, like my WiFi-connected iPhone, it still shows that page.

I have full internet access, and like I said, if I disable my antivirus, it works.  I also tried adding URL exceptions into Avast! for http:\\192.168.1.1, https:\\192.168.1.1, http:\\routerlogin.net, and https:\\routerlogin.net, but nothing is letting it go through.  I tried running a factory reset on the Router, and doing a power cycle... but it is still coming up.  It's not a DIRE issue, as I only need to access my router settings here and there, but it is a little aggitating, as I've never had an issue with Netgear routers in the past.

Has anyone run into this issue, or have suggestions for a fix?