If your 5ghz and 2.4 ghz networks are the same name, try renaming the 2.4 and connecting your Sonos devices to that. 

The last thing you should do is to reset your speakers. You lose everything when you do that.

A very simple solution would have been to reuse the SSID and password from your old router on the new router. Many of your devices would have automatically reconnected, but some may have just needed a restart.

Now I would suggest hardwiring a speaker to your router to see if the app recognizes it. if it does, continue setting up the rest of your speakers while its still connected.

Thank you for the response. I did reused the same SSID and password and it didn't work, hence I resetted the speakers.

I can see all speakers, but when I when I try to add I'm getting stuck on the "Wi-Fi and password error screen" every time.

I have connected the Lan cable directly from the router to the speaker and still I'm getting the same error.

Surely there should be a solution to this?

I’m having the same issue doing a fresh new installation of a Sonos Move

Make sure you're typing the SSID and password correctly. Such as caplocks being on when it shouldn't be. Exclamaton point (!) being typed instead of the number one (1). Capital letter "I" being confused with a lower case letter L (l). Just a few things things to check. 

I have managed to get my setup sorted just now after resetted my my speakers for the 100th time since Friday.

I logged out of my sonos app and uninstall it. Logged out of my Wi-Fi, and switched off my phone device and left it off for about 5 minutes.

Switched it on and reinstalled the Sonos app, logged in and select setup a new system, switched on my speakers one at a time, and used an ethernet for connection.

I don't how it worked cause I tried all these solutions in the past 3 days.

Thanks,@Stormy Norman i just did the same thing, and finally got the Sonos Move connected. I believe there’s some sort of bug that gets fixed (or removed) by uninstalling the app.

Thanks!

@luisc009, I'm glad you are also sorted.

Just bought a new router with seemingly space-age futuristic tech, and I’ve been struggling for days to get my Sonos Move onto the new network. Tried the steps above, but didn’t work for me. Note also that I have moved all computers, multimedia, tech, household gadgets, and appliances to the new router with zero issues.

My clunky old router had both frequencies on the same SSID and this never caused a problem.

For my setup, it appears the main issue for me was having the “authentication method” set at “WPA2/WPA3-Personal”. Apparently this confuses Move for initial setups, despite the fact that Move 2 supports WPA3-personal.

What I did:

• switched WiFi band from “2.4GHz / 5GHz / 6GHz” to only “2.4GHz / 5GHz” (with same SSID)… note that I had already manually set the “Channel bandwidth” for each channel in order to avoid potential broadcast conflicts.
• disabled WiFi7
• set “authentication method” to “WPA2-Personal” only.

Sonos people : Please fix setup issues. Users should not have to go through this mess when simply changing a network, especially for the “Move” system that is supposed to be able to… move. Users should also not have to be “afraid” of changing their network settings… this is such a painful process that I’ve had to go through already twice for all my systems. And now I’m afraid to touch anything!

I spent 90min with a fabulous support guy who was online middle of the night for him. Shout out to Sonos support because I can honestly say that their support teams are very dedicated and motivated - they do their utmost best to find the root cause of the problem.

Update : After I set up my Move with the settings above, I reset “authentication method” back to “WPA2/WPA3-Personal” (as it was before) and so far it seems to be working fine.

Thank you @Stormy Norman same problem and was getting very frustrated with the same error msg - your help and direction to uninstall the app fixed it. Thank you! Many hours now saved and once app reinstalled all working perfectly 

For other user also experiencing the same issue, the Sonos One SL also needed a software update but this does not trigger until app uninstalled and reinstalled so another reason my devices were not connecting