Well I’m trying to connect to my home WiFi and have the same so it’s not just you.  So is is just broken 

Same issue here, brand new era 300. Doesn’t detect any networks and fails to connect when manually entering the network name and password 

Update to this issue:

I have tried setting up the speaker again using a brand new network and now the app crashes every time I open it and try to log in. On the few occasions I have made it past the login screen, the app crashes in the process of trying to connect to the internet. I have tried using the new app on all of my devices (Samsung Tab s7 Plus, Samsung Galaxy s23 Ultra, iPod touch 7th gen, even tried to sideload the app into Windows Subsystem for Android) and none of these are working currently. I believe that this is an issue with the new app and not with my speaker. I am very irritated by this issue since I have an almost $500 speaker that does not work and have received little help from both Sonos and Best Buy where I purchased the speaker.

100% with you here.  I had the same issue, I had it corrected, and then it reappeared and I remain unable to get the setup process to complete.  

If I default the speaker, I can find the speaker and provide the network credentials, and then I can see it join the network, but it fails to ever make it into the system tab of the app.  When this resolved previously, it happened after the app updated again, I updated on my phone, I reset the speaker again, and I still had no luck, but a few hours later, I randomly tried again and it connected.

Now, a few days ago, I had an issue where my AP was restarted (Eero) and the Sonos would not connect again.  I saw that the app had updated again, so I could not be sure what was behind it, but I have since tried again on my default Verizon router, so I suspect we are back to having the app to blame.

Here is the other thread I participated in with more details.  

Very frustrated.  Really wish they would just give us the option to revert to the old app.  There are a lot of people that seem to have the same issue...

This is NOT you!  This is a problem with the last release and SONOS needs to get a patch out PRONTO!  Im having the same issues.  I got one to almost finish setup but failed at the end.  The other ERA 300 won't recognize the wifi so can't get past this step.  All other Sonos devices set up fine on this network. 

This is bad QA on their software release….the end.  

I have a Sonos Home Theatre system consisting of: Beam + Sub + 2 numbers of ERA 300.

4 weeks ago in May 2024, I had to change my home WIFI, as the contract was renewed. At the same time the Sonos APP also came up with an updated system

Ever since 1) Both the ERA300s are unable to pair with each other and 2) the Two Era 300 are unable to be connected to the Beam+Sub.

 I am able to see the ERA300 on my sonos App, but can only use them as an independent device, unable to pair them and connect them to the Beam+Sub system.

Here is a positive, but strange development for me.  I still believe that the app is at fault for much of the trouble many of us are experiencing, but my problems appear to be solved.

That said, I went through a network overhaul.  I replaced my Eero 6 system with Ubiquiti and my connection is now stable.  I did not do this for the Sonos issues - it was time to replace Eero, it was time to take more control of my system, and I was actually under the impression that Sonos notoriously did not play well with Ubiquiti - but as soon as I tried it on the new system, everything connected, first try and the connection has survived many restarts.

Maybe this additional info helps others out there.  If you are using Eero, maybe it plays a part?
 

It’s very frustrating when you invest in a system like Sonos, it doesn’t work and there is no real support to be had.  Every time you call the support line it is an hour wait.   This community is awesome, it was however, designed so that Sonos doesn’t have to take the financial responsibility to actually support its customers in a human way.