I’ve not seen that error code before. I’d be tempted to temporarily wire each speaker to your router with an Ethernet cable, and try the update again. Given that it’s several speakers, you might have to wire a single unit at a time, and work your way through, although the Sub is likely bonded to your Arc, and should be updated when the Arc gets updated.

However, since I have no idea what 1108 really means, it could equally be a ‘cannot communicate with the update server’ issue, which would suggest some sort of port blocking, most frequently associated with VPNs, work profiles, virus protection apps, and the like. You didn’t mention if any speakers were updated, if so, this is a moot paragraph. 

If neither of those suggestions work, you might want to call Sonos Support directly to discuss it.

When you speak directly to the phone folks, they have tools at their disposal that will allow them to give you advice specific to your network and Sonos system.

Only two SL one worked after the app update. It all worked well but after the update it's a disaster. I have no VPN or virus app. Monday I will contact support. 

Would love to know what 1108 really means!

The translation says "there is a problem with checking for updates". After a few times trying, the message says "you can use the product after it's updated ". But yeah...that's the problem, it won't update.

It’s odd that it updated the two One SLs , and failed on the rest, but that’s why I’m hoping Support can shed more light. 

Were you able to resolve your problem? Because I'm having the same error code today. I noticed that my sub wasn't connected anymore and did a factory reset and tried to do an update and now it's not updating.

I found the solution last night, if you use a WiFi extender. I turned it off and everything became visible again. Then I turned on the extender again, so far without any problems. I wanted to wait a while because I wanted to try it out for a few hours. But now you are also experiencing this problem. I hope this is the solution for you too. 

If it does not become visible immediately after you have turned off the WiFi extender. Then you must first add the product back to your Sonos system. Or try it with restarting the app.

I figured it out. I am currently using a eero mesh and I had my sound bar connected via ethernet and my other speakers connected via the eero wifi. Once I disconnect the ethernet and factory reset the sound bar so I could connect via the eero wifi it allowed me to find and set up the rest of my Sonos speakers. I did have to do a factory reset of all the speakers in order to set everything up properly. But it's all working now and I can see and control my Sonos system again. So long story short. If you use a mesh make sure it's eather all connected via ethernet or all connected via wifi. Do not connect mixed ie wifi and ethernet.

I can confirm that my disconnected ERA300’s updated again after I temporarily removed the Mesh networking (on FritzBox from AVM). I could then re-add these speakers to a room.

Hi,

I had similar issues with a PLAY1.

Followed all the suggestions - hard-wired, factory reset etc. Eventually rebooted router and this sorted this issue. 

...incase that helps anyone else with similar issues

It is usually best to save the factory reset for a last resort, after calling Sonos support if at all possible.

This happened to me too.

At first I noticed I couldn't see one of my one of my Sonos One SL speakers listed in the my Sonos App system settings, but I was still able to connect to it directly through Spotify. 

I decided to factory reset it after none of the normal actions worked (unplugging restarting router etc...).

As I was adding the speaker back to my system network I kept getting this 1108 error. (I think I saw a 1066 error at some point as well).

In the end I had to plug and unplug the speaker directly to the router through Ethernet. (A mixture of wi-fi and Ethernet)

- I started the factory reset using the Wi-Fi connection.

- And when I got the error message I switched to direct Ethernet connection.

- When that was done I unplugged the Ethernet and resumed on Wi-Fi until it gave me another error and had to switch back to Ethernet.

I think I had to do this a few times during the process before it was fixed and back in my system and registered.

Hope this helps anyone else who has this issue.

I have same problems - very frustrating.

I have 2x One SLs, 1x Sub, 1x Play 5 and one Arc.

Everything is connected now except the ARC which refuses to join the others [stalls at 1108]. The only way i can get contact with the ARC is to set up a new system - which defeats the purpose since then i hav 1 system with the arc and 1 other system with the other 4…

Sonos support - please get on this, it’s ridiculous.. 

If you want support to prioritize this you need to call them,

The forum mods can mention posts here but a support call is the way to get it prioritized 

OK after 4h infuriating hours it finally worked.

Wifi setup: Google Wifi Mesh with 5x points.
Sonos setup: 1x ARC, 2x One SL, 1x Sub, 1x Play:5

Steps:
1. Disconnected all Mesh points except the primary router.
2. Factory reset all speakers
3. Started with connecting ARC
4. The SLs
5. The Sub
6. The Play:5