YOLOv2 notebook local error - section 4.1

When I run the YOLOv2_ZeroCostDL4Mic notebook locally, I get an error in section 4.1, The error code is " train('config.json', full_model_path, percentage_validation) ". It seems that there is a problem with the format of the json file. And the error reported is as follows:

JSONDecodeError Traceback (most recent call last)
/tmp/ipykernel_3314/338773247.py in
1 os.chdir('/home/wan/Tensorflow_test/YOLOv2/content/keras-yolo2')
----> 2 train('config.json', full_model_path, percentage_validation)
3
4 shutil.copyfile('/home/wan/Tensorflow_test/YOLOv2/content/keras-yolo2/config.json',full_model_path+'/config.json')
5

/tmp/ipykernel_3314/2825244846.py in train(config_path, model_path, percentage_validation)
691
692 with open(config_path) as config_buffer:
--> 693 config = json.loads(config_buffer.read())
694
695 ###############################

~/miniconda3/envs/myenv/lib/python3.7/json/init.py in loads(s, encoding, cls, object_hook, parse_float, parse_int, parse_constant, object_pairs_hook, **kw)
346 parse_int is None and parse_float is None and
347 parse_constant is None and object_pairs_hook is None and not kw):
--> 348 return _default_decoder.decode(s)
349 if cls is None:
350 cls = JSONDecoder

~/miniconda3/envs/myenv/lib/python3.7/json/decoder.py in decode(self, s, _w)
335
336 """
--> 337 obj, end = self.raw_decode(s, idx=_w(s, 0).end())
338 end = _w(s, end).end()
339 if end != len(s):

~/miniconda3/envs/myenv/lib/python3.7/json/decoder.py in raw_decode(self, s, idx)
353 obj, end = self.scan_once(s, idx)
354 except StopIteration as err:
--> 355 raise JSONDecodeError("Expecting value", s, err.value) from None
356 return obj, end

JSONDecodeError: Expecting value: line 5 column 33 (char 131)

Start with the YOLOv2_ZeroCostDL4Mic notebook section 4.1 and the train(config.json, full_model_path, percentage_validation) entry point. Inspect config.json at line 5, column 33 and run the notebook locally to confirm the configuration parses and training proceeds past that call.