sonos deezer unable to browse music ?

@W.H. 

Imho there is some kind of trouble between the two Sonos Systems and your Family Account. Is the independent Deezer Account (with its own login data) of your friend part of your family plan? 
And is this S1 Sonos System still using your Sonos Account that also is used for the new S2 system? If so, i suggest your friend creates an own Sonos account and does factory resets for all devices that are part of the S1 system. Then he has to set up a NEW Sonos system using his own Sonos account data. 
At the moment there seems to be a conflict of mixed systems.  

All devices in the old S1 system were factory reset before handover. A new Sonos account has been created in the new S1 setup. Until today, we used the same Deezer account on both systems, logging in with different users. As I wrote before, I have already changed it. We now have two separate systems, two independent Sonos accounts and two different Deezer accounts under the same family plan.

@W.H. 

Ok, thx for your detailed information. So imho everything now looks like it should be… but for some reason it doesn’t work. 🤔 

You wrote that your accounts admin profile os working fine on the S1 system… what about using your friends account on your S2 system? Can you try this?

Is your S2 on latest firmware or has it an older version?

One last idea… what about region settings for your admin profile? What Country is set within Deezer settings?

And what country is set for your Sonos account?

I tried. After adding his Deezer account to S2, everything works as it should.

15.1.1

On the Sonos website, I see that the current version is 15.1.2. When I try to force update, I get a message that no software update is required.

The same.

I had another Connect at home from my old system. I plugged it into my home network and created two separate S2 and S1 systems with separate Sonos accounts. I added the Admin user from Deezer to S1 and  have no problem browsing my music...

@W.H.

Holy shit… 🤔 

So definitely your family account has a problem with your S2 system, and the strange thing is… in detail only with the admin profile. This is the point i really wonder about. 
Just one test would be left… what does your admin profile behave with a different S2 system…. But i can’t imagine that it’s a matter of your Sonos system, because your friends account  works fine with your S2 system. And if i understand correctly this also is a family account…. 
I‘m going to ask my contacts at Sonos if they have heared about such a problem. 
 

And i suggest you try to test your admin profile with another S2 system. 
 

And once again the question… is your family plan one of the newest generation including HiFi quality?

What country setting do you have in detail for Deezer and Sonos?

Please try to find out about any differences between your Deezer account and your friends one. 

Unfortunately, the account I logged into as a test is a separate user account that is a member of my family plan. This is the account I created yesterday from the user profile associated with my account to prevent simultaneous logins to my Deezer account from two different Sonos systems.

I don't know anyone with a Deezer family plan who could give me a test login to their account.

I also don't know anyone who has an S2 system on which I could test logging in to my account.

Yes.

Poland.

@W.H. 

Ok, i think without support help we can’t solve the problem. 
I got an answer from my Sonos contact and he suggests to reach out Sonos support team by phone. They can do some system analysis and dig deeper into the problem. Also they probabely can install a Deezer test account on your system to compare the situation. 
But also please reach out for Deezer support and tell them about the problem. Maybe they can take a look at the family profiles and reset your account. 
 

Btw… did you try to change your password and login with a new one?

I've been talking to Sonos support for three days, Deezer support for two.

I spoke with Sonos support over the phone for 1.5 hours, We have sent each other 40 emails so far. My problem will be escalated to the second line of support. I am impressed with how they care for their customers.

I can't say the same about Deezer's support. After my application, I got a confirmation of my application almost immediately, I was offered one solution, which did not work. I described this in another email to support and got no response.

I will let you know how I finally manage to solve this problem, what was the cause of it.

I've changed my password several times, but I haven't changed my login.

@W.H. 

Thx for the feedback… yes, Sonos support is really great. 😎 But in comparison with Deezer support, to be fair, they have much more manpower. Deezer hasn’t got a live technical support. They have to send the incoming cases, that need deeper technical investigations, to the developers and wait for feedback. This takes some time…

What about creating a new account and signing up for a different one month free family account? 
This could help to find out if it’s a general problem with your Sonos system or if it’s a special problem of your existing account or admin profile.