Thanks for sending your diagnostic logs.
Based on the traces, spacedesk has detected an incompatible display hook driver on your primary machine.
Do you have splashtop/Duet Display/ Fresco Logic software currently installed on your machine?
If yes, please uninstall it then reboot your primary machine.
After that please try again with spacedesk.
To verify if these drivers are not present on your machine, could you please follow the steps below:
– run command prompt as Administrator on your primary machine
– type these commands one by one:
sc query lci_proxykmd
sc query lci_proxywddm
sc query FLxHCIv
sc query ddkmd
sc query ddmgr
Then let us know if one of these command returns a Running or Stopped status.