Thanks for the logs.
It seems that something on your primary machine is preventing a spacedesk conection.
We noticed that you have AhnLab V3 Antivirus on your primary machine.
Could you please check if there’s an exception list setting on this antivirus app and just try to include spacedesk to allow incoming and outgoing connection.
The following are the spacedesk details you might need for manual setting:
service name: spacedeskService
file path: C:\Windows\system32\spacedeskService.exe
TCP/IP Port: 28252
UDP Port: 28252