So, which specific devices are shown as “incompatible”?
What region is your Sonos account on www.Sonos.com set to? That tends to be where they get the information to populate your “sources” display from. It would be equally blank if your Sonos system (the speakers, not the controller) were unable to reach the internet. When I updated from S1 to S2, all of my “sources” came with it, but that went through the normal upgrade process. If you factory reset your devices, for instance, that would erase all the “sources” shown, and give you nothing when you updated.
Tech support may be your best hope at this point. You’re unfortunately not providing enough information in your posts to build a mental image of your system in order to determine what might be going on. Every time I give a response, it’s basically a shot in the dark, since I just don’t know what you have, what network you have, what router you have, what devices you have, where your controller runs, which controller version number you’re running, what’s showing up where, etc.
Sonos would be able to see a lot in the system diagnostic, if you were to submit one and call them. Many of those questions I have would be covered by that data.