How to fixed the bellow error...Actually I am doing face detection so the script is working fine for single video/image but it gave the error on multi videos/images (error as i mentioned bellow)

Error using detectMinEigenFeatures (line 58) Expected ROI to be an array with number of elements equal to 4.

Error in face_tracking (line 17) points = detectMinEigenFeatures(rgb2gray(videoFrame), 'ROI', bbox);