for item in list_documents:
    print("The item is: ", item)
    wb = openpyxl.load_workbook(path+item)
    sh = wb.get_active_sheet()
    split_item = item.split(".")[0]
    new_name = str(split_item) + ".csv"
    with open(path + new_name, 'w', newline="") as f:
        c = csv.writer(f, delimiter=";")
        counter = 0
        for r in sh.rows:
            counter += 1
            print(counter)
            c.writerow([cell.value for cell in r])

Traceback (most recent call last):
  File "C:/Users/aprofir/Desktop/python_project/transform_data/xlsx_to_csv.py", line 31, in <module>
    c.writerow([cell.value for cell in r])
  File "C:UsersaprofirAppDataLocalProgramsPythonPython37-32libencodingscp1252.py", line 19, in encode
    return codecs.charmap_encode(input,self.errors,encoding_table)[0]
UnicodeEncodeError: 'charmap' codec can't encode character 'u0142' in position 173: character maps to <undefined>