Unable to connect. Try again later

Unfortunately, you’ve told us nothing about your network, which is most likely where an issue might crop up. Did you originally follow the instructions in the new router - installation instructions FAQ? Have you tried connecting a single speaker to your router with an Ethernet cable? Have you tried to call Sonos Support directly to discuss it?

If you’re using the BOOST, dump it. It’s no longer compatible with S2.

Moderator edit: Not accurate

Hey @CCarling welcome to the community! As @Airgetlam said, we need some information about your network to help you. There can be a few reasons why you would get that error message.
However, @ExtremeTMM is not correct. The Boost is still supported but not sold anymore, as people's home networks have improved so much that using your own router's Wi-Fi is better.

This is especially true since most modern Sonos speakers support 5GHz, helping to make playback a lot snappier.

My Play 3 speakers have always given me a good sound but can only manage a month without something needing to be reset? I’ve managed to suppress my frustrations until now when, like so many other customers, my speakers will not connect to each other “ Unable to connect “. It’s not my WiFi network it’s the updates. Please admit it and do something about it rather than a lame apology and going ahead with a system update that obviously isn’t working and will prevent many of us from enjoying our Sonos products. I think EBay may soon be flooded with Sonos products unfortunately. 

Often simply assigned static/reserved IP addresses for all Sonos will help that problem. Usually easy to do from your router DHCP page.

Same problem. I have a Deco TP Link wireless network system. I do not see this issue being a Deco wireless network issue, it is most likely a bad software issue with Sonos. When NO other wireless connected device has issues, I would suspect it to be an issue with the effected device.

The Sonos app sees the speaker in the system yet when I try to play music on the speak along with other speakers, I get the error “Unable to connect, try again later.” How much later am I supposed to wait? What is the Sonos system waiting on? If the app can see the speaker, it should be able to play music on the speaker.

No changes to network. One day it just “Unable to connect. Try again later.”

Bricking my beam, 4 Ones and sub.

Well, except for 1 One that plays at only a low volume.

Unplugged all and turned off router. Waited 30 seconds, turned on router. Waited for wifi to come back up and plugged each Sonos device back in one at a time. Same problem.