KNIME的ccdc配体准备python报错missing 1 required positional argument

在用KNIME的CCDC组件的时候，一直报错missing 1 required positional argument
之前2020年版本用着没问题，把ligand preparation升级成2021之后就一直报错。请问这是为什么呢?

```python
Traceback (most recent call last):
File "<string>", line 108, in <module>
  File "<string>", line 94, in prepare_molecules
  File "C:\Program Files\CCDC\Python_API_2021\miniconda\lib\site-packages\pandas\core\series.py", line 4045, in apply
    mapped = lib.map_infer(values, f, convert=convert_dtype)
  File "pandas/_libs/lib.pyx", line 2228, in pandas._libs.lib.map_infer
TypeError: _prepare_molecule() missing 1 required positional argument: 'molecule'