关于无法启动Bert中文向量训练包

我在启动Bert的中文训练包时，遇到这个问题不知道如何解决

I:[35mVENTILATOR[0m:freeze, optimize and export graph, could take a while...
2020-02-27 21:54:07.408910: W tensorflow/stream_executor/platform/default/dso_loader.cc:55] Could not load dynamic library 'cudart64_101.dll'; dlerror: cudart64_101.dll not found
2020-02-27 21:54:07.414121: I tensorflow/stream_executor/cuda/cudart_stub.cc:29] Ignore above cudart dlerror if you do not have a GPU set up on your machine.
c:\users\lenovo\appdata\local\programs\python\python37\lib\site-packages\bert_serving\server\helper.py:176: UserWarning: Tensorflow 2.1.0 is not tested! It may or may not work. Feel free to submit an issue at https://github.com/hanxiao/bert-as-service/issues/
  'Feel free to submit an issue at https://github.com/hanxiao/bert-as-service/issues/' % tf.__version__)
E:[36mGRAPHOPT[0m:fail to optimize the graph!
Traceback (most recent call last):
  File "c:\users\lenovo\appdata\local\programs\python\python37\lib\runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "c:\users\lenovo\appdata\local\programs\python\python37\lib\runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "C:\Users\Lenovo\AppData\Local\Programs\Python\Python37\Scripts\bert-serving-start.exe\__main__.py", line 7, in <module>
  File "c:\users\lenovo\appdata\local\programs\python\python37\lib\site-packages\bert_serving\server\cli\__init__.py", line 4, in main
    with BertServer(get_run_args()) as server:
  File "c:\users\lenovo\appdata\local\programs\python\python37\lib\site-packages\bert_serving\server\__init__.py", line 71, in __init__
    self.graph_path, self.bert_config = pool.apply(optimize_graph, (self.args,))
TypeError: cannot unpack non-iterable NoneType object