TypeError: Cannot create a consistent method resolution order (MRO) for bases Utils, LayeredPane

[debugger1979]

Hi!
I am trying to use your project for Almalinux 9 OS. The installation and preparation of the environment are performed according to your documentation. When trying to run a test script gedit.py an error appears:

[user@msvsphere-9 ldtp2]$ /usr/bin/env /bin/python /home/user/.vscode/extensions/ms-python.python-2023.22.1/pythonFiles/lib/python/debugpy/adapter/../../debugpy/launcher 59373 -- /home/user/ldtp2/examples/gedit.py
Traceback (most recent call last):
File "", line 1, in
File "/home/user/ldtp2/ldtpd/init.py", line 38, in
from .xmlrpc_daemon import XMLRPCLdtpd
File "/home/user/ldtp2/ldtpd/xmlrpc_daemon.py", line 25, in
from . import core
File "/home/user/ldtp2/ldtpd/core.py", line 68, in
from .combo_box import ComboBox
File "/home/user/ldtp2/ldtpd/combo_box.py", line 286, in
class ComboBox(Utils, LayeredPane):
TypeError: Cannot create a consistent method resolution
order (MRO) for bases Utils, LayeredPane
Traceback (most recent call last):
File "/home/user/ldtp2/examples/gedit.py", line 20, in
import ldtp, ooldtp
File "/usr/local/lib/python3.9/site-packages/ldtp-3.5.1-py3.9.egg/ldtp/init.py", line 593, in
_populateNamespace(globals())
File "/usr/local/lib/python3.9/site-packages/ldtp-3.5.1-py3.9.egg/ldtp/init.py", line 247, in _populateNamespace
for method in client._client.system.listMethods():
File "/usr/lib64/python3.9/xmlrpc/client.py", line 1122, in call
return self.__send(self.__name, args)
File "/usr/lib64/python3.9/xmlrpc/client.py", line 1464, in __request
response = self.__transport.request(
File "/usr/local/lib/python3.9/site-packages/ldtp-3.5.1-py3.9.egg/ldtp/client.py", line 152, in request
h=self.send_request(host, handler, request_body, bool(verbose))
File "/usr/lib64/python3.9/xmlrpc/client.py", line 1291, in send_request
self.send_content(connection, request_body)
File "/usr/lib64/python3.9/xmlrpc/client.py", line 1321, in send_content
connection.endheaders(request_body)
File "/usr/lib64/python3.9/http/client.py", line 1280, in endheaders
self._send_output(message_body, encode_chunked=encode_chunked)
File "/usr/lib64/python3.9/http/client.py", line 1040, in _send_output
self.send(msg)
File "/usr/lib64/python3.9/http/client.py", line 980, in send
self.connect()
File "/usr/lib64/python3.9/http/client.py", line 946, in connect
self.sock = self._create_connection(
File "/usr/lib64/python3.9/socket.py", line 844, in create_connection
raise err
File "/usr/lib64/python3.9/socket.py", line 832, in create_connection
sock.connect(sa)
ConnectionRefusedError: [Errno 111] Connection refused

Please help me figure out this error.