I tried to importing frontal face cascading method but it wasnt work,is there anyone who solve this error?

Question

cv2.error: OpenCV(4.4.0) C:\\Users\\appveyor\\AppData\\Local\\Temp\\1\\pip-req-build-6sxsq0tp\\opencv\\modules\\objdetect\\src\\cascadedetect.cpp:1689: error: (-215:Assertio