Thank you very much for sending the diagnostic logs.
Could you please double check if spacedeskService is allowed on your Windows Firewall settings.
Just open the Windows Settings -> Update & Security -> Windows Security -> Firewall & Network Protection -> Allow an app through firewall, then check the list if “spacedeskService” is checked on both Private and Public.
By the way, what is your current Network profile on your primary machine?
You can check it on Windows Settings -> Network & Internet -> Ethernet, then click the connected network to show the Network Profile, if it’s Public or Private.