Have you gone through the initial process of setting up and calibrating the camera already? If not, then check out these links as they go through this in depth. Circle back if you’re having a specific issue that’s unrelated to this.
Using a Camera - LightBurn Software Documentation
LightBurn Camera - Setup and Calibration - LightBurn Software - LightBurn Software Forum
Tips for calibrating / aligning the camera - FAQ - LightBurn Software Forum