How to resolve the Cannot prepare connection OMMStreamConnection?

Whenever I run

fchi = Chain(name="0#TU+")print(fchi.constituents)

I get the following error:

ConnectionError Traceback (most recent call last)
Cell In[29], line 2
1 fchi = Chain(name="0#TU+")
----> 2 print(fchi.constituents)

File c:\Program64\Python\venv\maanv7\lib\site-packages\lseg\data\discovery_universe_expanders_chain.py:131, in Chain.constituents(self)
129 @property
130 def constituents(self):
--> 131 return self._chains.constituents

File c:\Program64\Python\venv\maanv7\lib\site-packages\lseg\data_tools_common.py:223, in cached_property.get(self, instance, cls)
222 def get(self, instance, cls=None):
--> 223 result = instance.dict[self.func.name] = self.func(instance)
224 return result

File c:\Program64\Python\venv\maanv7\lib\site-packages\lseg\data\discovery_universe_expanders_chain.py:119, in Chain._chains(self)
117 @cached _property
118 def _chains(self):
--> 119 return get_chain_data(self._name)

File c:\Program64\Python\venv\maanv7\lib\site-packages\lseg\data\discovery_universe_expanders_chain.py:84, in get_chain_data(name)
79 for func in (
80 get_chain_data_from_stream,
81 get_chain_data_from_adc,
82 ):
83 try:
---> 84 return func(name)
85 except ScopeError:
86 continue

File c:\Program64\Python\venv\maanv7\lib\site-packages\lseg\data\discovery_universe_expanders_chain.py:31, in get_chain_data_from_stream(name)
29 chain_stream = chain.Definition(name).get_stream()
30 chain_stream.on_error(on_error)
---> 31 chain_stream.open()
32 chain_stream.close()
33 constituents = chain_stream.constituents

File c:\Program64\Python\venv\maanv7\lib\site-packages\lseg\data\delivery_stream_basestream.py:71, in StreamOpenWithUpdatesMixin.open(self, with_updates)
69 def open(self, with_updates: bool = True) -> OpenState:
70 self._try_update_session()
---> 71 self._stream.open(with_updates=with_updates)
72 return self.open_state

File c:\Program64\Python\venv\maanv7\lib\site-packages\lseg\data\delivery_stream_basestream.py:165, in BaseStream.open(self, *args, **kwargs)
163 def open(self, *args, **kwargs) -> OpenState:
164 self.debug(f"{self.classname} state={self.state} open {fill(args=args, kwargs=kwargs)}")
--> 165 return self.state.open(*args, **kwargs)

File c:\Program64\Python\venv\maanv7\lib\site-packages\lseg\data\delivery_stream\states_basestream_states.py:51, in UnopenedBaseStreamSt.open(self, *args, **kwargs)
50 def open(self, *args, **kwargs) -> OpenState:
---> 51 return self.stream.do_open(*args, **kwargs)

File c:\Program64\Python\venv\maanv7\lib\site-packages\lseg\data\delivery_stream_basestream.py:182, in BaseStream.do_open(self, *args, **kwargs)
179 raise AssertionError("Session must be open")
181 self.transition_to(self.states.opening_st)
--> 182 self._do_open(*args, **kwargs)
183 if self.is_close_st:
184 return OpenState.Closed

File c:\Program64\Python\venv\maanv7\lib\site-packages\lseg\data\content\pricing\chain_stream.py:231, in StreamingChain._do_open(self, with_updates, *args, **kwargs)
229 while name:
230 if not self.has_stream(name):
--> 231 self.add(name).open(with_updates=with_updates)
233 self.wait_refresh(name)
235 if self.is_stream_close(name):

File c:\Program64\Python\venv\maanv7\lib\site-packages\lseg\data\delivery_stream_basestream.py:165, in BaseStream.open(self, *args, **kwargs)
163 def open(self, *args, **kwargs) -> OpenState:
164 self.debug(f"{self.classname} state={self.state} open {fill(args=args, kwargs=kwargs)}")
--> 165 return self.state.open(*args, **kwargs)

File c:\Program64\Python\venv\maanv7\lib\site-packages\lseg\data\delivery_stream\states_basestream_states.py:51, in UnopenedBaseStreamSt.open(self, *args, **kwargs)
50 def open(self, *args, **kwargs) -> OpenState:
---> 51 return self.stream.do_open(*args, **kwargs)

File c:\Program64\Python\venv\maanv7\lib\site-packages\lseg\data\delivery_stream_basestream.py:182, in BaseStream.do_open(self, *args, **kwargs)
179 raise AssertionError("Session must be open")
181 self.transition_to(self.states.opening_st)
--> 182 self._do_open(*args, **kwargs)
183 if self.is_close_st:
184 return OpenState.Closed

File c:\Program64\Python\venv\maanv7\lib\site-packages\lseg\data\delivery_stream_omm_stream.py:317, in PrvOMMStream._do_open(self, with_updates, *args, **kwargs)
315 def _do_open(self, *args, with_updates=True, **kwargs) -> None:
316 self.with_updates = with_updates
--> 317 super()._do_open(*args, **kwargs)

File c:\Program64\Python\venv\maanv7\lib\site-packages\lseg\data\delivery_stream_stream.py:79, in Stream._do_open(self, *args, **kwargs)
77 try:
78 self.debug(f"{self.classname} request cxn")
---> 79 self.cxn = stream_cxn_cache.get_cxn(self.session, self.details)
80 self.debug(f"{self.classname} received cxn={self.cxn.name}")
81 except ScopeError as e:

File c:\Program64\Python\venv\maanv7\lib\site-packages\lseg\data\delivery_stream_stream_cxn_cache.py:127, in StreamCxnCache.get_cxn(self, session, details)
125 is_debug and session.debug("StreamCxnCache: Connection will be deleted, because failure")
126 self.del_cxn(cxn, session, details)
--> 127 raise ConnectionError(f"Cannot prepare connection {cxn}")
129 else:
130 item.inc_use()

ConnectionError: Cannot prepare connection OMMStreamConnection
name : ThreadOMMSTREAMING_CHAINS_0.3
state : StreamCxnState.Disposed
subprotocol : tr_json2
is_auto_reconnect: True
can_reconnect : False
num_attempt : 0