XB7-CM and HP LaserJet Pro color M451dw

This printer has ALWAYS been a bit of a challenge to set up with a new network but the XB7-CM is challenging me like no other past router.

I have a thread going here at HP's site: click here

Bottom line thus far is I have tried a myriad of things to get the wireless printer connected to the new wireless network.

The previous XB6-T was just fine.

I suspect that it might have something to do with this XB7's lack of ability to assign 2.4 or 5 GHz.  It chooses for you.

I'm pretty certain I installed it on the 2.4 GHz frequency with the XB6-T.

I finally did a "Restore Defaults" on the printer and that actually fixed it being permanently stuck in "Error 79" mode.

Now I can't get the wireless of the printer to link to the router.  Even WPS results in a temporary Error 79 mode.

Every attempt to get the wireless going results in Error 79 on my printer.

Anyway, any thoughts from the collective here?  This is quite frustrating.