Unable to connect Flight Server / Sonar / DremioEE 21.8.3

Hello
I try to connect Dremio EE 21.8.3 Software (not cloud release) using following method Connecting to Dremio Using Apache Arrow Flight in Python | Dremio.
I get following error … which in fact is an empty message.
Traceback (most recent call last):
File “C:\Users\xx\Roaming\JetBrains\PyCharmCE2023.2\scratches\scratch.py”, line 23, in
stream = dremio.toPandas(“SELECT * FROM DB.test”)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File “D:\Users\xx\Documents\Portable\Python\Python312\Lib\site-packages\dremio_simple_query\connect.py”, line 53, in toPandas
streamReader = self.query(querystring, self.client, self.headers)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File “D:\Users\xx\Documents\Portable\Python\Python312\Lib\site-packages\dremio_simple_query\connect.py”, line 27, in query
flight_info = client.get_flight_info(flight.FlightDescriptor.for_command(query), options)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File “pyarrow\_flight.pyx”, line 1600, in pyarrow._flight.FlightClient.get_flight_info
File “pyarrow\_flight.pyx”, line 58, in pyarrow._flight.check_flight_status
pyarrow._flight.FlightServerError: Flight RPC failed with message:

I can’t solve this issue … anyone would help ?

Regards