Hi @click4time,
spacedesk should work over Access point.
It does not require internet connection, only local area network is needed between primary and secondary machine.
Could you please tell us how did you setup the access point?
And please send us the following info:
Primary Machine
– operating system (Windows 8.1/10)?
– graphics adapter (AMD/Intel/Nvidia)
– network connection type (wired/wireless/USB tethering/WiFi Direct)
Secondary Machine
– Viewer type (Android/iOS/Windows/HTML5)
– network connection type (wired/wireless/USB tethering/WiFi Direct)