Could you please try the following steps: 1. On primary machine, run spacedesk SERVER window, click the menu button then select "Clear All Display Settings". 2. on secondary machine / tablet, go to Settings -> Rotation -> Auto-Rotation, then uncheck it.
After the steps above, please try to connect again. FYI: Once connected, you can easily switch to extension/mirror via display settings window on your primary machine. For assistance, please refer to our spacedesk user manual on how to operate and troubleshoot Looking forward to your feedback.
One Corporate Centre, Unit 3012
Meralco Ave. Corner Doña Julia Vargas Ave.
Ortigas Center, Pasig City, 1605
Metro Manila, Philippines