Traceback (most recent call last):
  File "<frozen runpy>", line 198, in _run_module_as_main
  File "<frozen runpy>", line 88, in _run_code
  File "/root/services/ui_backend_service/data/cache/client/cache_server.py", line 364, in <module>
    cli(auto_envvar_prefix='MFCACHE')
  File "/usr/local/lib/python3.11/site-packages/click/core.py", line 1128, in __call__
    return self.main(*args, **kwargs)
  File "/usr/local/lib/python3.11/site-packages/click/core.py", line 1053, in main
    rv = self.invoke(ctx)
  File "/usr/local/lib/python3.11/site-packages/click/core.py", line 1395, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/usr/local/lib/python3.11/site-packages/click/core.py", line 754, in invoke
    return __callback(*args, **kwargs)
  File "/root/services/ui_backend_service/data/cache/client/cache_server.py", line 358, in cli
    Scheduler(store, max_actions).loop()
  File "/root/services/ui_backend_service/data/cache/client/cache_server.py", line 326, in loop
    self.cleanup_if_necessary()
  File "/root/services/ui_backend_service/data/cache/client/cache_server.py", line 287, in cleanup_if_necessary
    self.cleanup_workers()
  File "/root/services/ui_backend_service/data/cache/client/cache_server.py", line 298, in cleanup_workers
    self.cleanup_pool()
  File "/root/services/ui_backend_service/data/cache/client/cache_server.py", line 304, in cleanup_pool
    self.pool = multiprocessing.Pool(
  File "/usr/local/lib/python3.11/multiprocessing/context.py", line 119, in Pool
    return Pool(processes, initializer, initargs, maxtasksperchild,
  File "/usr/local/lib/python3.11/multiprocessing/pool.py", line 215, in __init__
    self._repopulate_pool()
  File "/usr/local/lib/python3.11/multiprocessing/pool.py", line 306, in _repopulate_pool
    return self._repopulate_pool_static(self._ctx, self.Process,
  File "/usr/local/lib/python3.11/multiprocessing/pool.py", line 329, in _repopulate_pool_static
    w.start()
  File "/usr/local/lib/python3.11/multiprocessing/process.py", line 121, in start
    self._popen = self._Popen(self)
  File "/usr/local/lib/python3.11/multiprocessing/context.py", line 281, in _Popen
    return Popen(process_obj)
  File "/usr/local/lib/python3.11/multiprocessing/popen_fork.py", line 19, in __init__
    self._launch(process_obj)
  File "/usr/local/lib/python3.11/multiprocessing/popen_fork.py", line 71, in _launch
    code = process_obj._bootstrap(parent_sentinel=child_r)
  File "/usr/local/lib/python3.11/multiprocessing/process.py", line 314, in _bootstrap
    self.run()
  File "/usr/local/lib/python3.11/multiprocessing/process.py", line 108, in run
    self._target(*self._args, **self._kwargs)
  File "/usr/local/lib/python3.11/multiprocessing/pool.py", line 125, in worker
    result = (True, func(*args, **kwds))
  File "/root/services/ui_backend_service/data/cache/client/cache_worker.py", line 29, in execute_action
    execute(tempdir, action_cls, request)
  File "/root/services/ui_backend_service/data/cache/client/cache_worker.py", line 51, in execute
    res = action_cls.execute(
  File "/root/services/ui_backend_service/data/cache/generate_dag_action.py", line 89, in execute
    with streamed_errors(stream_output):
  File "/usr/local/lib/python3.11/contextlib.py", line 158, in __exit__
    self.gen.throw(typ, value, traceback)
  File "/root/services/ui_backend_service/data/cache/utils.py", line 130, in streamed_errors
    get_traceback_str()
  File "/root/services/ui_backend_service/data/cache/utils.py", line 124, in streamed_errors
    yield
  File "/root/services/ui_backend_service/data/cache/generate_dag_action.py", line 94, in execute
    dag = DataArtifact("{}/_graph_info".format(param_step.task.pathspec)).data
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/metaflow/client/core.py", line 875, in data
    obj = filecache.get_artifact(ds_type, location[6:], meta, *components)
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/metaflow/client/filecache.py", line 207, in get_artifact
    _, obj = next(
             ^^^^^
  File "/usr/local/lib/python3.11/site-packages/metaflow/datastore/task_datastore.py", line 364, in load_artifacts
    for (key, blob) in self._ca_store.load_blobs(to_load.keys()):
  File "/usr/local/lib/python3.11/site-packages/metaflow/datastore/content_addressed_store.py", line 140, in load_blobs
    with open(file_path, "rb") as f:
         ^^^^^^^^^^^^^^^^^^^^^

TypeError: expected str, bytes or os.PathLike object, not NoneType