Fit to camera not working?

c4cc wrote:

Thanks. Is parent inverse matrix a default setting for objects, or does it arise due to other factors like puzzles?

This parent inverse matrix is created by Blender when it tries to preserve the position of the parented object. It causes additional offset which is not compatible with the camera fit feature. That’s why the error is printed in the browser console.

Unfortunately yes. This is because that parenting occurred when the object had zero transform. So once you clear its parent inverse matrix, it got the same zero transform, but this time relative to the camera. After you clear parent inverse you should reposition the parented object back to what you need.