Can you discover the primary machine/server on your viewer app?
Did you get the “Unable to connect” box upon clicking the primary machine/server?
What is your secondary machine/Viewer app? Android/iOS/Windows?
For analysis, please also send us the diagnostic logs of your primary machine.
Just open the spacedesk Driver Console app -> Diagnostics -> 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.