Tidal and Local music keeps stopping (Sonos endpoints)

Support
4
  1. The Windows 10 PC is an Asus Vivo VM42_VM62_VM62N series, Intel 13-4005U CPU @1.70Ghz, 4.00 Gb RAM. I am not very technical, so I hope that helps.
  2. The router is the one supplied by my ISP Alice (France) model L-ADSL05CF
  3. There is a switch, a Netgear Prosafe 24 port, but I don’t know enough to tell you if it is managed or unmanaged
  4. I am using some powerline networking to extend my network to a second building, but the problem I am experiencing is all within the one building, so the powerline networking is not involved. You may have seen from the log that I was playing music to the Sitting room, which is about 3 metres from the PC, with the connection running PC-Cat5-switch-router-switch-cat5-sonos-Linn.
  5. No error messages on Roon.
  6. I have rebooted my core machine but nothing else.
  7. When you say “play directly” do you mean to the internal speakers of the PC ? I haven’t tried that but will do so if it would help you.

What strikes me is that the problem has only occurred recently - i.e. since 1.4 was installed. Before that, no problem. Can I roll back to an earlier version ?