No camera models listed to choose from

First time using this app, on macOS. When I choose Select for Camera, the list is empty. Is there something I am missing here?

The program gets the camera list from https://actionstitch.com//get_camera_data. Can you open this link in your browser on the same computer?

Ah, thank you. Going to the link and then opening up ActionStitch seems to have made it work for whatever reason. Thank you!