error when converting convert semantic labeling to floorplanCAD v1 version and generate rasterized images

[2019211753]

when i execuatepython preprocess/svg2png.py --train_00 datasets/svg_raw/train-00 --train_01 datasets/svg_raw/train-01 --test_00 datasets/svg_raw/test-00 --svg_dir datasets/svg_processed/svg --png_dir datasets/svg_processed/png --scale 7 --cvt_color errors comes:

Traceback (most recent call last):
  File "preprocess/svg2png.py", line 9, in <module>
    from utils_dataset import *
  File "/data1/user/yb/CADTransformer/preprocess/utils_dataset.py", line 14, in <module>
    from config import anno_config
  File "/data1/user/yb/CADTransformer/preprocess/../config/__init__.py", line 5, in <module>
    from .default import _C as config
  File "/data1/user/yb/CADTransformer/preprocess/../config/default.py", line 73, in <module>
    _C.cluster_vis_dir = None
  File "/data1/user/yb/anaconda3/envs/CAD/lib/python3.7/site-packages/yacs/config.py", line 158, in __setattr__
    type(value), name, _VALID_TYPES
  File "/data1/user/yb/anaconda3/envs/CAD/lib/python3.7/site-packages/yacs/config.py", line 521, in _assert_with_logging
    assert cond, msg
AssertionError: Invalid type <class 'NoneType'> for key cluster_vis_dir; valid types = {<class 'str'>, <class 'int'>, <class 'bool'>, <class 'tuple'>, <class 'list'>, <class 'float'>}

is there anybody knows how to deal with it?thanks