Do you have VPN (Virtual Private Network) enabled?
What is the current Network Profile on primary machine? Public or Private?
You can check it in Windows Settings -> Network & Internet.
For analysis, please also run spacedesk Driver Console -> Diagnostic, click “Save All Information”.
PS: Saving all information will take a few seconds, then please send us the whole folder which contains all the diagnostic logs collected.
Please right-click the folder -> Send to -> Compressed (zipped) folder, then attach the *.zip file in your next reply.