Image not found

[meghasn]

label = classify_face(image)

File "label_detect.py", line 62, in classify_face
image = cv2.cvtColor(image, cv2.COLOR_BGR2RGB)
cv2.error: OpenCV(4.4.0) C:\Users\appveyor\AppData\Local\Temp\1\pip-req-build-2b5g8ysb\opencv\modules\imgproc\src\color.cpp:182: error: (-215:Assertion failed) !_src.empty() in function 'cv::cvtColor'

Since praj.jpg is not given I tried using my image but still the error remains..Is there any requirement for the image used