Hi @eva-s,
Thanks for sending the diagnostic logs.
Could you please try to change the current network profile of your primary machine to Private?
Just go to Windows Settings -> Network & Internet -> Properties, under Network profile, select Private, then check if your viewer can discover now your primary machine.
Also, please try with the most recent spacedesk Driver v1.0.50 available on the website – https://forum.spacedesk.net
Then check if you still have the same issue.