So frustrated. Working one day, not the next.

Here is a video of the system not working --- https://youtu.be/o4VtzC9ULA8

I assume that wherever 'overseas' is, it is somewhere where Alexa on Sonos is implemented, and this does not depend on a VPN?

No VPN required and my Wifi should rock sold (using Meraki MR42) -- I wonder how good the Sonos wifi is though.

What do you mean by the 'Sonos wifi'? There is no such thing. There is a Sonos mesh wireless protocol called SonosNet which you may or may not be using. Do you have a Sonos device wired to your router?

May I ask which country you are in?

Hi eeze

Sonos does not have Wi-Fi in the conventional sense. Sonos actually rides on whatever network (Wi-Fi or Ethernet) it is connected to. If you can play music to the speaker via your iOS or Android device then I'd say the speakers Wi-Fi card is working. Try wiring the speaker to your router to place it on the SonosNet. Alexa could also be trying to communicate with a server that could be down.

Edit: Sorry John B I was typing this and had to stop for a few minutes. When I started I could not see your post. You know the rest :8

Hi John... Sonos One is connected via wireless to my home network. 2.4ghz network (not my 5ghz) to be exact.
Meraki shows the device online, it's not replying.

The device is connected wirelessly, no wiring.
No idea what Sonos mesh wireless protocol is, I suspect it's for multi room. I'm not using that.
Country is Thailand

Hi eeze

The SonosMesh is a proprietary network that is established when you wire a Sonos speaker to your router. The SonosMesh generates a stronger signal that will help eliminate dead spots common with Wi-Fi and provide for better overall communication with Sonos components. Read about it here: https://support.sonos.com/s/article/3235?language=en_US

I'm not using SonosMesh. I'm using the built in 2.4ghz wifi, as I wrote above....

I can assure you that my wifi is pervasive around my house. I have enterprise grade access-points in my home.

Anyways, it was working yesterday, now it's not. I didn't move the device nor change any settings

According to the Sonos Support website, Thailand is not listed as a country in which Alexa is supported on Sonos. I'm actually surprised it is working at all, but this may explain your difficulties, which are not common.

"Where is Amazon Alexa on Sonos available?
Amazon Alexa is currently available in the United States, Australia, Austria, Canada, France, Germany, Ireland, Italy, Japan, Mexico, New Zealand, Spain, and the United Kingdom."

My other amazon echo devices have worked fine for the last year. Anyways, teh device is registered in the US.

Right now the Sonos isn't connected to Wifi, I can see the home network in it's entirety.

This has been a charade. I come here asking for help with a system that was working yesterday, and I get hit with questions about Sonosmesh and wiring into my router.

Regarding Alexa not working - See this
https://www.quora.com/Does-Alexa-work-in-other-countries

Nothing but issues with this product.