'utf-8' codec can't decode byte 0xfe in position 0: invalid start byte

I'm trying to make a product review analyzer with Python. I built a dataset with Excel with two columns containing positive and negative feedback adjectives. The program should then analyze the review and check the text's negative and positive feedback numbers with a for loop.

import numpy as np
import pandas as pd

data = pd.read_csv("data.csv")

str = "some string"

numbers = []
positives = []
negatives = []

def wordCount(word):
    avoided = word.split()
    print("There are", len(avoided), "words in this string")
    for i in range(len(avoided)):
        numbers.append(avoided.count(avoided[i]))
        if avoided[i] in data["Positive"]:
            positives.append(avoided[i])
        elif avoided[i] in data["Negative"]:
            negatives.append(avoided[i])
    print(positives, negatives)
    print(numbers)
    print(avoided[numbers.index(np.max(numbers))], np.max(numbers))

wordCount(str)

But unfortunately, when I try to get each column of the dataset, an error occurs:

'utf-8' codec can't decode byte 0xfe in position 0: invalid start byte

I tried encoding and decoding the dataset and tried converting it into a list. None of them worked, and the program pursued on giving me the same error again.

Is it because I import the dataset the wrong way? Is something wrong with my code?

Can someone please help me how to solve it?