Projecting from a laptop or desktop computer usually works well. However, the problem described often occurs with mobile devices.
If you’re using an iOS device, try using the control panel to select a different AirPlay configuration. Also, make sure your device has the latest version of iOS installed.
If you are still having problems, please contact us at firstname.lastname@example.org. Explain the situation and tell us which app you are trying to project. Together we will surely find a solution to the problem!