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我正在尝试创建一个机器学习模型来预测谁会在泰坦尼克号上生存。每次我尝试拟合我的模型时，都会收到此错误：

Traceback (most recent call last):
  File "c:\Users\seand\.vscode\extensions\ms-python.python-2020.6.89148\pythonFiles\ptvsd_launcher.py", line 48, in <module>
    main(ptvsdArgs)
  File "c:\Users\seand\.vscode\extensions\ms-python.python-2020.6.89148\pythonFiles\lib\python\old_ptvsd\ptvsd\__main__.py", line 432, in main
    run()
  File "c:\Users\seand\.vscode\extensions\ms-python.python-2020.6.89148\pythonFiles\lib\python\old_ptvsd\ptvsd\__main__.py", line 316, in run_file
    runpy.run_path(target, run_name='__main__')
    return _run_module_code(code, init_globals, run_name,
  File "D:\Python\lib\runpy.py", line 97, in _run_module_code
    _run_code(code, mod_globals, init_globals,
  File "D:\Python\lib\runpy.py", line 87, in _run_code
    exec(code, run_globals)
  File "d:\Kaggle\Titanic\titanic4.py", line 100, in <module>
    cat_cols2 = pd.DataFrame(OneHot1.fit_transform(new_df[cat_columns]))
  File "D:\Python\lib\site-packages\pandas\core\frame.py", line 2806, in __getitem__
    indexer = self.loc._get_listlike_indexer(key, axis=1, raise_missing=True)[1]
  File "D:\Python\lib\site-packages\pandas\core\indexing.py", line 1552, in _get_listlike_indexer
    self._validate_read_indexer(
  File "D:\Python\lib\site-packages\pandas\core\indexing.py", line 1640, …