json模块读取json文件时出现错误，怎么都没用。我该怎么办？

python
import json
with open('z://1122//mylist.json',encoding='utf-8-sig')as file:
word = file.read()
print(json.loads(word))

C:\Users\Administrator\PycharmProjects\pythonProject\venv\Scripts\python.exe C:/Users/Administrator/PycharmProjects/pythonProject/访问文件系统/1s.py
Traceback (most recent call last):
  File "C:/Users/Administrator/PycharmProjects/pythonProject/访问文件系统/1s.py", line 4, in <module>
    print(json.loads(word))
  File "C:\Users\Administrator\AppData\Local\Programs\Python\Python37\lib\json\__init__.py", line 348, in loads
    return _default_decoder.decode(s)
  File "C:\Users\Administrator\AppData\Local\Programs\Python\Python37\lib\json\decoder.py", line 337, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
  File "C:\Users\Administrator\AppData\Local\Programs\Python\Python37\lib\json\decoder.py", line 355, in raw_decode
    raise JSONDecodeError("Expecting value", s, err.value) from None
json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)

打印下word 是否有值，报了None