CameraCalibrator "Loading failed" "Too Many Output Arguments"

I am runing the Camera Calibrator app in 2018b Matlab.

When trying to load multiple colour .jpg images i get the following error "Loading failed" "Too Many Output Arguments". No images are loaded.

Online advice seems ot relate to a stereo issue.

Any suggestions?

[Birju Patel]

Could you upload your images? That would help reproduce this issue. Thanks!