Error when starting program and an object is detected.

[fatcat2]

Error Message

WHAT THE FUCK

Traceback (most recent call last):
File "main.py", line 30, in
j.update(img1)
File "C:\Users\ryan\Documents\GitHub\SCSIFinal\TrackedObject.py", line 69, in update
self.track_box, self.tracking_window = cv2.CamShift(self.prob, self.tracking_window, term_crit)
TypeError: function takes exactly 4 arguments (3 given)