Just got my camera today. Downloaded the software to my 2018 MacBook Pro running Mojave. Followed the instructions. Opened your app, plugged in the camera, selected the Plugable Camera. Lights come on, but the image window is black. Shut down the app. Started Photobooth, selected the Plugable camera, and it works.
Deleted the Plugable software, re-installed it. Same story: the lights come on, but the preview window is black. Cannot get the camera to display in the image window of the Plugable application. Please help.