There is no camera capture option available in Luban.
You are using the USB cable to connect the machine to Snapmaker Luban (Camera Capture can only be accessed via Wi-Fi connection).
Connect the machine with Luban via Wi-Fi instead, and you will be able to use Camera Capture.
For how to use the Camera Capture function, you can refer to this tutorial video
After following the troubleshooting steps, if you find it difficult to resolve your issue, kindly submit a support ticket through https://snapmaker.formcrafts.com/support-ticket and share your troubleshooting results with some pictures/videos.
Our dedicated support team will be more than willing to assist you in resolving the issue.