Hello,
I just tried to export a scene with a camera, a light and a bezier curve (I wanted to check if your exporter can export bezier curve); however it seems that the exporter is unhappy about the default camera.
See the error message below:
It seems that the attribute trackToBoundingCenter does not exist on the object Camera; maybe is it due to a recent change in Blender 2.8’s API?
EDIT: to delete the camera does solve the problem.