copy+paste of terminal output when I run $ ros2 launch rplidar_ros test_rplidar.launch.py

rplidar_output.log

$ ros2 launch rplidar_ros test_rplidar.launch.py 
[INFO] [launch]: All log files can be found below /home/${USER}/.ros/log/2020-12-10-10-12-52-180891-ubcin-4782
[INFO] [launch]: Default logging verbosity is set to INFO
/opt/ros/foxy/share/rplidar_ros/launch/test_rplidar.launch.py:7: UserWarning: The parameter 'node_executable' is deprecated, use 'executable' instead
  Node(
/opt/ros/foxy/share/rplidar_ros/launch/test_rplidar.launch.py:7: UserWarning: The parameter 'node_name' is deprecated, use 'name' instead
  Node(
/opt/ros/foxy/share/rplidar_ros/launch/test_rplidar.launch.py:20: UserWarning: The parameter 'node_executable' is deprecated, use 'executable' instead
  Node(
/opt/ros/foxy/share/rplidar_ros/launch/test_rplidar.launch.py:20: UserWarning: The parameter 'node_name' is deprecated, use 'name' instead
  Node(
Task exception was never retrieved
future: <Task finished name='Task-2' coro=<LaunchService._process_one_event() done, defined at /opt/ros/foxy/lib/python3.8/site-packages/launch/launch_service.py:271> exception=SubstitutionFailure("executable 'rplidarNodeClient' not found on the libexec directory '/opt/ros/foxy/lib/rplidar_ros' ")>
Traceback (most recent call last):
  File "/opt/ros/foxy/lib/python3.8/site-packages/launch/launch_service.py", line 273, in _process_one_event
    await self.__process_event(next_event)
  File "/opt/ros/foxy/lib/python3.8/site-packages/launch/launch_service.py", line 293, in __process_event
    visit_all_entities_and_collect_futures(entity, self.__context))
  File "/opt/ros/foxy/lib/python3.8/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/foxy/lib/python3.8/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/foxy/lib/python3.8/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/foxy/lib/python3.8/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/foxy/lib/python3.8/site-packages/launch/action.py", line 108, in visit
    return self.execute(context)
  File "/opt/ros/foxy/lib/python3.8/site-packages/launch_ros/actions/node.py", line 442, in execute
    ret = super().execute(context)
  File "/opt/ros/foxy/lib/python3.8/site-packages/launch/actions/execute_process.py", line 775, in execute
    self.__expand_substitutions(context)
  File "/opt/ros/foxy/lib/python3.8/site-packages/launch/actions/execute_process.py", line 635, in __expand_substitutions
    cmd = [perform_substitutions(context, x) for x in self.__cmd]
  File "/opt/ros/foxy/lib/python3.8/site-packages/launch/actions/execute_process.py", line 635, in <listcomp>
    cmd = [perform_substitutions(context, x) for x in self.__cmd]
  File "/opt/ros/foxy/lib/python3.8/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/foxy/lib/python3.8/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/foxy/lib/python3.8/site-packages/launch/launch_context.py", line 184, in perform_substitution
    return substitution.perform(self)
  File "/opt/ros/foxy/lib/python3.8/site-packages/launch_ros/substitutions/executable_in_package.py", line 84, in perform
    raise SubstitutionFailure(
launch.substitutions.substitution_failure.SubstitutionFailure: executable 'rplidarNodeClient' not found on the libexec directory '/opt/ros/foxy/lib/rplidar_ros' 
Task exception was never retrieved
future: <Task finished name='Task-8' coro=<LaunchService._process_one_event() done, defined at /opt/ros/foxy/lib/python3.8/site-packages/launch/launch_service.py:271> exception=RuntimeError('Signal event received before subprocess transport available.')>
Traceback (most recent call last):
  File "/opt/ros/foxy/lib/python3.8/site-packages/launch/launch_service.py", line 273, in _process_one_event
    await self.__process_event(next_event)
  File "/opt/ros/foxy/lib/python3.8/site-packages/launch/launch_service.py", line 293, in __process_event
    visit_all_entities_and_collect_futures(entity, self.__context))
  File "/opt/ros/foxy/lib/python3.8/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/foxy/lib/python3.8/site-packages/launch/action.py", line 108, in visit
    return self.execute(context)
  File "/opt/ros/foxy/lib/python3.8/site-packages/launch/actions/opaque_function.py", line 75, in execute
    return self.__function(context, *self.__args, **self.__kwargs)
  File "/opt/ros/foxy/lib/python3.8/site-packages/launch/actions/execute_process.py", line 421, in __on_signal_process_event
    raise RuntimeError('Signal event received before subprocess transport available.')
RuntimeError: Signal event received before subprocess transport available.
[INFO] [rplidar_composition-1]: process started with pid [4784]
[rplidar_composition-1] [INFO] [1607616772.262004866] [rplidar_composition]: RPLIDAR running on ROS 2 package rplidar_ros. SDK Version: '1.12.0'
[rplidar_composition-1] [ERROR] [1607616776.771473486] [rplidar_composition]: Error, operation time out. RESULT_OPERATION_TIMEOUT!
[ERROR] [rplidar_composition-1]: process[rplidar_composition-1] failed to terminate '5' seconds after receiving 'SIGINT', escalating to 'SIGTERM'
[INFO] [rplidar_composition-1]: sending signal 'SIGTERM' to process[rplidar_composition-1]
[ERROR] [rplidar_composition-1]: process has died [pid 4784, exit code -15, cmd '/opt/ros/foxy/lib/rplidar_ros/rplidar_composition --ros-args -r __node:=rplidar_composition -r __node:=rplidar_composition --params-file /tmp/launch_params_cjajmrz4'].