Error: Unable to connect to websocket

Hello,

I am trying to install sunbeam cluster and I have this error :

sunbeam cluster bootstrap --accept-defaults

           DEBUG Unable to connect to websocket utils.py:276
                    Traceback (most recent call last):
                      File "/snap/openstack/324/lib/python3.10/site-packages/sunbeam/utils.py", line 274, in __call__
                        return self.main(*args, **kwargs)
                      File "/snap/openstack/324/lib/python3.10/site-packages/click/core.py", line 1055, in main
                        rv = self.invoke(ctx)
                      File "/snap/openstack/324/lib/python3.10/site-packages/click/core.py", line 1657, in invoke
                        return _process_result(sub_ctx.command.invoke(sub_ctx))
                      File "/snap/openstack/324/lib/python3.10/site-packages/click/core.py", line 1657, in invoke
                        return _process_result(sub_ctx.command.invoke(sub_ctx))
                      File "/snap/openstack/324/lib/python3.10/site-packages/click/core.py", line 1404, in invoke
                        return ctx.invoke(self.callback, **ctx.params)
                      File "/snap/openstack/324/lib/python3.10/site-packages/click/core.py", line 760, in invoke
                        return __callback(*args, **kwargs)
                      File "/snap/openstack/324/lib/python3.10/site-packages/sunbeam/commands/bootstrap.py", line 275, in bootstrap
                        run_plan(plan4, console)
                      File "/snap/openstack/324/lib/python3.10/site-packages/sunbeam/jobs/common.py", line 248, in run_plan
                        skip_result = step.is_skip(status)
                      File "/snap/openstack/324/lib/python3.10/site-packages/sunbeam/commands/sunbeam_machine.py", line 65, in is_skip
                        run_sync(self.jhelper.get_application(APPLICATION, MODEL))
                      File "/snap/openstack/324/lib/python3.10/site-packages/sunbeam/jobs/juju.py", line 57, in run_sync
                        result = asyncio.get_event_loop().run_until_complete(coro)
                      File "/usr/lib/python3.10/asyncio/base_events.py", line 649, in run_until_complete
                        return future.result()
                      File "/snap/openstack/324/lib/python3.10/site-packages/sunbeam/jobs/juju.py", line 190, in wrapper
                        await self.controller.connect(
                      File "/snap/openstack/324/lib/python3.10/site-packages/juju/controller.py", line 138, in connect
                        await self._connector.connect(**kwargs)
                      File "/snap/openstack/324/lib/python3.10/site-packages/juju/client/connector.py", line 78, in connect
                        self._connection = await Connection.connect(**kwargs)
                      File "/snap/openstack/324/lib/python3.10/site-packages/juju/client/connection.py", line 366, in connect
                        raise Exception("Unable to connect to websocket")
                    Exception: Unable to connect to websocket
           WARNING An unexpected error has occurred. Please run 'sunbeam inspect' to generate an inspection report. utils.py:281
           ERROR Error: Unable to connect to websocket utils.py:282
alexd@ubuntuserver:~$ ^C
alexd@ubuntuserver:~$ sunbeam inspect
An unexpected error has occurred. Please run 'sunbeam inspect' to generate an inspection report.
Error: Unable to connect to websocket