[cowrie proxy mode] PoolClientFactory stopped

[LMscope]

Hello, I am trying to run cowrie in a proxy mode using a backend pool of 10 VMs.
However, I am not observing any activities on the VMs nor in the log file /cowrie/var/log/cowrie/cowrie.json.
That being said, I opted to investigate the /cowrie/var/log/cowrie/cowrie.log to check for any error, I found the following:

2023-01-23T02:51:35.060412+0000 [-] Removing stale pidfile /home/cowrie/cowrie/var/run/cowrie.pid
2023-01-23T02:51:35.060662+0000 [-] Python Version 3.8.10 (default, Nov 14 2022, 12:59:47) [GCC 9.4.0]
2023-01-23T02:51:35.060688+0000 [-] Twisted Version 22.10.0
2023-01-23T02:51:35.060698+0000 [-] Cowrie Version 2.5.0
2023-01-23T02:51:35.061649+0000 [-] Loaded output engine: jsonlog
2023-01-23T02:51:35.062219+0000 [cowrie.pool_interface.client.PoolClientFactory#info] Starting factory <cowrie.pool_interface.client.PoolClientFactory object at 0x7f53e5cf5130>
2023-01-23T02:51:35.062968+0000 [twisted.scripts._twistd_unix.UnixAppLogger#info] twistd 22.10.0 (/home/cowrie/cowrie/cowrie-env/bin/python 3.8.10) starting up.
2023-01-23T02:51:35.063040+0000 [twisted.scripts._twistd_unix.UnixAppLogger#info] reactor class: twisted.internet.epollreactor.EPollReactor.
2023-01-23T02:51:35.068118+0000 [Uninitialized] Initialising pool with Cowrie settings...
2023-01-23T02:51:35.146101+0000 [PoolClient,client] VM pool fully initialised
2023-01-23T02:51:35.154086+0000 [PoolClient,client] Unhandled Error
Traceback (most recent call last):
File "/home/cowrie/cowrie/cowrie-env/lib/python3.8/site-packages/twisted/python/log.py", line 96, in callWithLogger
return callWithContext({"system": lp}, func, *args, **kw)
File "/home/cowrie/cowrie/cowrie-env/lib/python3.8/site-packages/twisted/python/log.py", line 80, in callWithContext
return context.call({ILogContext: newCtx}, func, *args, **kw)
File "/home/cowrie/cowrie/cowrie-env/lib/python3.8/site-packages/twisted/python/context.py", line 117, in callWithContext
return self.currentContext().callWithContext(ctx, func, *args, **kw)
File "/home/cowrie/cowrie/cowrie-env/lib/python3.8/site-packages/twisted/python/context.py", line 82, in callWithContext
return func(*args, **kw)
--- ---
File "/home/cowrie/cowrie/cowrie-env/lib/python3.8/site-packages/twisted/internet/posixbase.py", line 487, in _doReadOrWrite
why = selectable.doRead()
File "/home/cowrie/cowrie/cowrie-env/lib/python3.8/site-packages/twisted/internet/tcp.py", line 248, in doRead
return self._dataReceived(data)
File "/home/cowrie/cowrie/cowrie-env/lib/python3.8/site-packages/twisted/internet/tcp.py", line 253, in _dataReceived
rval = self.protocol.dataReceived(data)
File "/home/cowrie/cowrie/cowrie-env/lib/python3.8/site-packages/twisted/internet/endpoints.py", line 149, in dataReceived
return self._wrappedProtocol.dataReceived(data)
File "/home/cowrie/cowrie/src/cowrie/pool_interface/client.py", line 75, in dataReceived
self.parent.initialisation_response(res_code)
File "/home/cowrie/cowrie/src/cowrie/pool_interface/handler.py", line 61, in initialisation_response
self.cowrie_plugin.pool_ready()
File "/home/cowrie/cowrie/src/twisted/plugins/cowrie_plugin.py", line 250, in pool_ready
create_endpoint_services(
File "/home/cowrie/cowrie/src/cowrie/core/utils.py", line 129, in create_endpoint_services
endpoint = endpoints.serverFromString(reactor, listen_endpoint)
File "/home/cowrie/cowrie/cowrie-env/lib/python3.8/site-packages/twisted/internet/endpoints.py", line 1802, in serverFromString
return plugin.parseStreamServer(reactor, *args, **kw)
File "/home/cowrie/cowrie/cowrie-env/lib/python3.8/site-packages/twisted/internet/endpoints.py", line 1559, in parseStreamServer
return self._parseServer(reactor, *args, **kwargs)
File "/home/cowrie/cowrie/cowrie-env/lib/python3.8/site-packages/twisted/internet/endpoints.py", line 1547, in _parseServer
fileno = self._sddaemon.inheritedDescriptors()[int(index)]
builtins.IndexError: list index out of range
2023-01-23T02:51:35.155782+0000 [cowrie.pool_interface.client.PoolClientFactory#info] Stopping factory <cowrie.pool_interface.client.PoolClientFactory object at 0x7f53e5cf5130>

From what I am reading in the logs, it seems the cowrie pool client factory has stopped, but I am not sure the reason behind that. May I ask for help on that matter, please? if any additional information is required from my side to clarify the problem please let me know. I appreciate any help in advance.