Start with the FAQ items for this:
The camera doesn’t find the lens calibration pattern (pattern NOT found) - FAQ - LightBurn Software Forum
Tips for calibrating / aligning the camera - FAQ - LightBurn Software Forum
Doing a search for “camera calibration” will bring up a large number of search returns for issues that people have had.
Can you explain what this means?
This is addressed as part of the alignment process. Only the usable portion of the camera capture will be projected onto your workspace.
Have you read through the documentation for this?
Using a Camera - LightBurn Software Documentation