Hello there, this message should pop up only when you have images in the project, Use camera poses is set to either From camera pose priors or From component, and the cameras “can’t see the point cloud” which might be caused by a different coordinate system or that the images and point cloud are not from the same location.
This message should not appear when Use camera poses is set to Generate aerial poses.
Please clarify if you have any images (are they georeferenced?) in the project during the LAS import, and if you really see this message when using Generate aerial poses.