System not found on network ……. EVERYTIME i access app

I had this issue too but what I did was go into settings then network then I hit update network. I updated the WiFi on all my devices and magically it worked. I updated it to the same exact WiFi it was already on and for some reason it worked.  I’ve been good for a few days with no issues now. 

If you are using an router with app try to figure out if your speaker is connected to your WiFi. If it isn’t connected you would have an information about no system, even if your phone is connected to the proper WiFi. 
I had a problem that my second speaker (any of my four) hadn’t be able connect to my WiFi. Even the diode was white after doing the factory reset procedure. 
Because you are sure that you are choosing the proper WiFi it must be problem with the speaker and its connection. 
It’s also possible to accidentally create the second empty system in the app, you should change your system. 

Thanks. I’ve updated my network, reinstalled my “system” and speakers probably 10 times already! I’ve factory reset both speakers 3 times too. Nothing I try seems to work. 

Hi all, just adding my voice to this as I have exactly the same very frustrating problems and have been trying to fix them for a couple of months now (I have two Era 100s and one Roam), specifically:

• My app always tells me the speakers aren’t connected to the network, even though I’ve connected them. About 1/5 times after about 15 minutes it changes its mind and will display (apparently randomly) 1,2 or 3 of my three speakers as being available. There is usually a problem with the though, most often that the volume is set to zero and I can’t change it on the app.

• Voice control still apparently works, but also with a roulette element to it - when I say ‘sonos play’ either nothing happens/error noise, or it starts to play from the Sonos radio, or it resumes playing what I was playing before. Sometimes I can control which speakers are playing via the app, sometimes I can’t.
• New this week: the microphones on the three different speakers seem to have combined/morphed. If I say ‘sonos play’ into the one in my bedroom, it will start playing in the living room, but not in the bedroom. The microphone on the living room one doesn’t work at all though, so I have to control it from the bedroom. Sometimes the Roam will join in, sometimes not.

I’ve spoken to my internet provider (talktalk) who have tested all the connections (and told me the solution some had found on their forum of removing ‘wifi optimisation’ doesn’t apply to me). Everything is fine. I’ve also done all the resetting/re-installing that others have tried.

Is there anyone from Sonos customer support on here who can gather our collective problems and try to find a solution? 

It is mentioned a couple of times, last year pre new App

And here:

Also, some info on BT site about the modes:

https://www.bt.com/help/broadband/what-is-the-wireless-mode-feature-on-my-bt-smart-hub-#:

Hi Colin and everyone and thank you for sharing this info. I made this change on my talktalk router and for about a day it seemed to have worked, but now back to how it was before so I’m going to keep trying to get through to Sonos customer support and hope they have another fix up their sleeves!

Same here, worked for a whole 24 hours moving to mode 2. Now back to the same old garbage. No system found. 
 

Thankfully I have interest in my speakers so hopefully, I’ll be done with them and can try another brand. I was planning on trying a Five with Ethernet connection but I’m not even going to go this route now. I’m done with Sonos. 

Well, my Sonos saga is now over. I have sold all my speaker today after getting absolutely nowhere trying all suggestions to fix my app issue. 
 

I had planned on trying a Five (with Ethernet port) to see if the hard wired connection made any difference but have decided against sticking with Sonos. Going to research other brands now and try elsewhere, as it’s too much money to spend and risk this same ridiculous situation happening again. 
 

For those sticking with it, good luck and I hope you get a solution soon. 

I have the same issue but after restarting the app it usually finds the speakers. This is clearly an issue on the Sonos side. The app fails on bigger homes with wifi range extenders. This shows how this products are dependent on smartphones and wifi networks. Smartphone issue? WiFi issue? No music. I would consider selling it if there’s a better alternative, but I’m not sure there is.

I've just been told by Sonos that it might be my 5g router causing this problem. Seemingly their fine print says 5g is unsupported. I pointed out I've had for 2yrs without issue as problems only occured in the last couple of months.