部署后运行报错

[quanjin9099]

{
"errorMessage": "Expecting value: line 1 column 1 (char 0)",
"errorType": "JSONDecodeError",
"stackTrace": [
[
"File "/code/main.py"",
"line 33",
"in main_handler",
"evt = json.loads(body)"
],
[
"File "/var/fc/lang/python3.9/lib/python3.9/json/init.py"",
"line 346",
"in loads",
"return _default_decoder.decode(s)"
],
[
"File "/var/fc/lang/python3.9/lib/python3.9/json/decoder.py"",
"line 337",
"in decode",
"obj, end = self.raw_decode(s, idx=_w(s, 0).end())"
],
[
"File "/var/fc/lang/python3.9/lib/python3.9/json/decoder.py"",
"line 355",
"in raw_decode",
"raise JSONDecodeError("Expecting value", s, err.value) from None"
]
]
}