有1个bug想请教一下

[yancie-yjr]

Traceback (most recent call last):
File "labelme2coco.py", line 115, in
train_instance = l2c_train.to_coco(train_path)
File "labelme2coco.py", line 30, in to_coco
self.images.append(self._image(obj, json_path))
File "labelme2coco.py", line 58, in _image
img_x = utils.img_b64_to_arr(obj['imageData'])
File "/home/hustget/miniconda2/envs/open-mmlab/lib/python3.7/site-packages/labelme/utils/image.py", line 24, in img_b64_to_arr
img_data = base64.b64decode(img_b64)
File "/home/hustget/miniconda2/envs/open-mmlab/lib/python3.7/base64.py", line 87, in b64decode
return binascii.a2b_base64(s)
binascii.Error: Invalid base64-encoded string: number of data characters (73941) cannot be 1 more than a multiple of 4
这个ｂｕｇ需要怎么改