Shapeoko workspace set to XL size but Lightburn thinks it's XXL size

Try this,

1 - Click the ‘Devices’ button found in the ‘Laser’ window
2 - Double-click your “Shapeoko XL” profile
3 - Click ‘Next’ button to advance to next window

and again…

Check and adjust as needed, the settings you have for the work area dimensions, then continue to click ‘Next’ through completion.