face tracking error: (-215:Assertion failed) !empty() in function 'cv::CascadeClassifier::detectMultiScale

Question

I continue getting this error. I've read that it means the images are not available. I've copied the path and used the proper directory. I've cloned the haarcascade_frontalface_default.xml directly from opencv Github. Not sure what I messed up on here.

I'm following this tutorial for facetracking online: https://www.youtube.com/watch?v=LmEcyQnfpDA&t=7600s

Any help appreciated!

Here are the code and errors:

Code:

import cv2
import numpy as np

def findFace(img):
    faceCascade = cv2.CascadeClassifier('Resources/haarcascade_frontalface_default.xml')
    imgGray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
    faces = faceCascade.detectMultiScale(imgGray,1.1,8)

    myFaceListC = []
    myFaceListArea = []

    for (x,y,w,h) in faces:
        cv2.rectangle(img,(x,y),(x + w, y + h),(0,0,255),2)


cap = cv2.VideoCapture(0)

while True:
    _, img = cap.read()
    findFace(img)
    cv2.imshow("Output",img)
    cv2.waitKey(1)

Errors:

Traceback (most recent call last):
  File "C:/Users/zachd/PycharmProjects/droneproject2/venv/Face Tracking.py", line 20, in <module>
    findFace(img)
  File "C:/Users/zachd/PycharmProjects/droneproject2/venv/Face Tracking.py", line 7, in findFace
    faces = faceCascade.detectMultiScale(imgGray,1.1,8)
cv2.error: OpenCV(4.5.1) C:\Users\appveyor\AppData\Local\Temp\1\pip-req-build-oduouqig\opencv\modules\objdetect\src\cascadedetect.cpp:1689: error: (-215:Assertion failed) !empty() in function 'cv::CascadeClassifier::detectMultiScale'

[ WARN:1] global C:\Users\appveyor\AppData\Local\Temp\1\pip-req-build-oduouqig\opencv\modules\videoio\src\cap_msmf.cpp (434) `anonymous-namespace'::SourceReaderCB::~SourceReaderCB terminating async callback