Regarding cascade classifier

import numpy as np
import cv2
import matplotlib.pyplot as plt
import pandas as pd
eyesdetector = cv2.CascadeClassifier(‘C:\Users\Shivank\Desktop\Coding-Blocks\Projects\7.Face-Recogniton\frontalEyes35x16.xml’)

In this code I am getting error :
SystemError: <class ‘cv2.CascadeClassifier’> returned a result with an error set in last line, why is this happening.