executable '[<launch.substitutions.text_substitution.TextSubstitution>]' not found on the PATH

I am trying to launch the first example from the ros2 control demo package: https://github.com/ros-controls/ros2_control_demos/tree/humble. I am using ROS2 humble on ubuntu 22.04. First I built every package successfully, then sourced the install/setup.bash and started the launchfile with:

ros2 launch ros2_control_demo_example_1 view_robot.launch.py
But I received the following Error.

[ERROR] [launch]: Caught exception in launch (see debug for traceback): executable '[<launch.substitutions.text_substitution.TextSubstitution object at 0x7f6a81793cd0>]' not found on the PATH
I did not change any code from the example. It would be nice if somebody could help me or tell me what the problem is?

Here is my Traceback:

[DEBUG] [launch.launch_context]: emitting event synchronously: 'launch.events.IncludeLaunchDescription'
[INFO] [launch]: All log files can be found below /home/user/.ros/log/date
[INFO] [launch]: Default logging verbosity is set to DEBUG
[DEBUG] [launch]: processing event: '<launch.events.include_launch_description.IncludeLaunchDescription object at 0x7f6a8632e3e0>'
[DEBUG] [launch]: processing event: '<launch.events.include_launch_description.IncludeLaunchDescription object at 0x7f6a8232e3e0>' ✓ '<launch.event_handlers.on_include_launch_description.OnIncludeLaunchDescription object at 0x7f6a8236d8a0>'
Executing <Task finished name='Task-2' coro=<LaunchService._process_one_event() done, defined at /opt/ros/humble/lib/python3.10/site-packages/launch/launch_service.py:228> exception=SubstitutionFailure("executable '[<launch.substitutions.text_substitution.TextSubstitution object at 0x7f6a81793cd0>]' not found on the PATH") created at /opt/ros/humble/lib/python3.10/site-packages/launch/launch_service.py:318> took 0.133 seconds
[DEBUG] [launch]: An exception was raised in an async action/event
[DEBUG] [launch]: Traceback (most recent call last):
  File "/opt/ros/humble/lib/python3.10/site-packages/launch/launch_service.py", line 336, in run_async
    raise completed_tasks_exceptions[0]
  File "/opt/ros/humble/lib/python3.10/site-packages/launch/launch_service.py", line 230, in _process_one_event
    await self.__process_event(next_event)
  File "/opt/ros/humble/lib/python3.10/site-packages/launch/launch_service.py", line 250, in __process_event
    visit_all_entities_and_collect_futures(entity, self.__context))
  File "/opt/ros/humble/lib/python3.10/site-packages/launch/utilities/visit_all_entities_and_collect_futures_impl.py", line 45, in visit_all_entities_and_collect_futures
    futures_to_return += visit_all_entities_and_collect_futures(sub_entity, context)
  File "/opt/ros/humble/lib/python3.10/site-packages/launch/utilities/visit_all_entities_and_collect_futures_impl.py", line 45, in visit_all_entities_and_collect_futures
    futures_to_return += visit_all_entities_and_collect_futures(sub_entity, context)
  File "/opt/ros/humble/lib/python3.10/site-packages/launch/utilities/visit_all_entities_and_collect_futures_impl.py", line 45, in visit_all_entities_and_collect_futures
    futures_to_return += visit_all_entities_and_collect_futures(sub_entity, context)
  [Previous line repeated 1 more time]
  File "/opt/ros/humble/lib/python3.10/site-packages/launch/utilities/visit_all_entities_and_collect_futures_impl.py", line 38, in visit_all_entities_and_collect_futures
    sub_entities = entity.visit(context)
  File "/opt/ros/humble/lib/python3.10/site-packages/launch/action.py", line 108, in visit
    return self.execute(context)
  File "/opt/ros/humble/lib/python3.10/site-packages/launch_ros/actions/node.py", line 490, in execute
    self._perform_substitutions(context)
  File "/opt/ros/humble/lib/python3.10/site-packages/launch_ros/actions/node.py", line 445, in _perform_substitutions
    evaluated_parameters = evaluate_parameters(context, self.__parameters)
  File "/opt/ros/humble/lib/python3.10/site-packages/launch_ros/utilities/evaluate_parameters.py", line 164, in evaluate_parameters
    output_params.append(evaluate_parameter_dict(context, param))
  File "/opt/ros/humble/lib/python3.10/site-packages/launch_ros/utilities/evaluate_parameters.py", line 72, in evaluate_parameter_dict
    evaluated_value = perform_substitutions(context, list(value))
  File "/opt/ros/humble/lib/python3.10/site-packages/launch/utilities/perform_substitutions_impl.py", line 26, in perform_substitutions
    return ''.join([context.perform_substitution(sub) for sub in subs])
  File "/opt/ros/humble/lib/python3.10/site-packages/launch/utilities/perform_substitutions_impl.py", line 26, in <listcomp>
    return ''.join([context.perform_substitution(sub) for sub in subs])
  File "/opt/ros/humble/lib/python3.10/site-packages/launch/launch_context.py", line 240, in perform_substitution
    return substitution.perform(self)
  File "/opt/ros/humble/lib/python3.10/site-packages/launch/substitutions/command.py", line 94, in perform
    command_str = perform_substitutions(context, self.command)
  File "/opt/ros/humble/lib/python3.10/site-packages/launch/utilities/perform_substitutions_impl.py", line 26, in perform_substitutions
    return ''.join([context.perform_substitution(sub) for sub in subs])
  File "/opt/ros/humble/lib/python3.10/site-packages/launch/utilities/perform_substitutions_impl.py", line 26, in <listcomp>
    return ''.join([context.perform_substitution(sub) for sub in subs])
  File "/opt/ros/humble/lib/python3.10/site-packages/launch/launch_context.py", line 240, in perform_substitution
    return substitution.perform(self)
  File "/opt/ros/humble/lib/python3.10/site-packages/launch/substitutions/path_join_substitution.py", line 45, in perform
    performed_substitutions = [sub.perform(context) for sub in self.__substitutions]
  File "/opt/ros/humble/lib/python3.10/site-packages/launch/substitutions/path_join_substitution.py", line 45, in <listcomp>
    performed_substitutions = [sub.perform(context) for sub in self.__substitutions]
  File "/opt/ros/humble/lib/python3.10/site-packages/launch/substitutions/find_executable.py", line 66, in perform
    raise SubstitutionFailure("executable '{}' not found on the PATH".format(self.name))
launch.substitutions.substitution_failure.SubstitutionFailure: executable '[<launch.substitutions.text_substitution.TextSubstitution object at 0x7f6a81793cd0>]' not found on the PATH

[ERROR] [launch]: Caught exception in launch (see debug for traceback): executable '[<launch.substitutions.text_substitution.TextSubstitution object at 0x7f6a81793cd0>]' not found on the PATH
[DEBUG] [launch.launch_context]: emitting event: 'launch.events.Shutdown'
[DEBUG] [launch]: processing event: '<launch.events.shutdown.Shutdown object at 0x7f6a8232e140>'
[DEBUG] [launch]: processing event: '<launch.events.shutdown.Shutdown object at 0x7f6a8232e140>' ✓ '<launch.event_handlers.on_shutdown.OnShutdown object at 0x7f6a8171cbb0>'
[DEBUG] [launch]: processing event: '<launch.events.shutdown.Shutdown object at 0x7f6a8232e140>' ✓ '<launch.event_handlers.on_shutdown.OnShutdown object at 0x7f6a8232c9a0>'