Google Assistant Setup Issue - "Could not update the setting. Please check your connection"

[PetrolHead]

OK.
I found one more thing to investigate.

I use IPSET to whitelist countries allowed to access my network. Google have data centres all over the world.
Need to rethink my security before changing this.

Can't get Google Assistant account linking working

Apologies in advance for the long-winded intro post, but I’m at my wit’s end, and have tried just about everything I can think of. I’ve been running HA for a good couple of years now, and generally have no issues figuring my way through any problems I encounter, but I’m simply stumped by this one. For context, I run HA via pip install, on Raspbian, behind nginx, using a dedicated hostname, with a Lets Encrypt certificate. All functions within HA itself are working perfectly (including using it …