I installed the harmony app, but when I try to use it this error came up ( in red ) : " Somthing went wrong please try again later." ( cannot read property IP of undefined ).

About the same happen with the sonos app.
I have tried to removed and insatll many times, but the result is the same

And your harmony has a fixed ip in your router?

Also for the sonos ofcours

Are you on the same wifi channel, homey and Sonos?