Thanks for sending the diagnostic logs.
Based on the log, spacedesk Server is currently Stopped/OFF.
Please try to switch ON the spacedesk Server in the CONTROL section of the spacedesk Driver Console app.
Thanks for sending the new logs.
Could you please check in the Windows Display Settings if there’s a detached secondary display?
If it’s there, please attach it by selecting the “Extend these displays” in the Multiple displays dropdown menu.