AMCL & MOVE_BASE: [ WARN] No laser scan received (and thus no pose updates have been published) for ... seconds. Verify that data is being published on the /scan topic.

edit

I am using a ROS Noetic, with the ubuntu 20.0.4. I am trying to configure the navigation stack, with the amcl so that it will has a pose update as well as 2D Nav Goal. with the specification:

1. Ubiquity Magni Silver Bot (raspberry pi 4.0)
2. SICK TiM781 LiDAR Sensor

But I am facing this error: ~/catkin_ws/src/navigation/launch$ roslaunch move_base.launch ... logging to /home/ubuntu/.ros/log/c187012c-0a6c-11ee-99c3-e45f019c7a48/roslaunch-ezrobotSP-18699.log Checking log directory for disk usage. This may take a while. Press Ctrl-C to interrupt Done checking log file disk usage. Usage is <1GB.

started roslaunch server http://ezrobotSP.local:46705/

SUMMARY
========

PARAMETERS
 * /amcl/base_frame_id: base_link
 * /amcl/global_frame_id: map
 * /amcl/gui_publish_rate: 10.0
 * /amcl/initial_cov_aa: 0.05
 * /amcl/initial_cov_xx: 0.5
 * /amcl/initial_cov_yy: 0.5
 * /amcl/initial_pose_a: 0.0
 * /amcl/initial_pose_x: 0.0
 * /amcl/initial_pose_y: 0.0
 * /amcl/kld_err: 0.05
 * /amcl/kld_z: 0.99
 * /amcl/laser_max_beams: 30
 * /amcl/laser_max_range: 12.0
 * /amcl/max_particles: 2000
 * /amcl/min_particles: 500
 * /amcl/min_update_angle: 0.2
 * /amcl/min_update_dist: 0.2
 * /amcl/odom_alpha1: 0.2
 * /amcl/odom_alpha2: 0.2
 * /amcl/odom_alpha3: 0.2
 * /amcl/odom_alpha4: 0.2
 * /amcl/odom_frame_id: odom
 * /amcl/save_pose_rate: 0.5
 * /amcl/scan: scan
 * /amcl/tf_broadcast: True
 * /map_server/frame_id: map
 * /move_base/TrajectoryPlannerROS/acc_lim_theta: 3.2
 * /move_base/TrajectoryPlannerROS/acc_lim_x: 2.5
 * /move_base/TrajectoryPlannerROS/acc_lim_y: 2.5
 * /move_base/TrajectoryPlannerROS/holonomic_robot: False
 * /move_base/TrajectoryPlannerROS/max_vel_theta: 1.0
 * /move_base/TrajectoryPlannerROS/max_vel_x: 0.45
 * /move_base/TrajectoryPlannerROS/meter_scoring: True
 * /move_base/TrajectoryPlannerROS/min_in_place_vel_theta: 0.4
 * /move_base/TrajectoryPlannerROS/min_vel_x: 0.1
 * /move_base/TrajectoryPlannerROS/sim_time: 1.5
 * /move_base/TrajectoryPlannerROS/xy_goal_tolerance: 0.15
 * /move_base/TrajectoryPlannerROS/yaw_goal_tolerance: 0.3
 * /move_base/global_costmap/footprint: [[0.13, 0.24], [0...
 * /move_base/global_costmap/global_frame: map
 * /move_base/global_costmap/inflation_radius: 0.2
 * /move_base/global_costmap/laser_scan_sensor/clearing: True
 * /move_base/global_costmap/laser_scan_sensor/data_type: LaserScan
 * /move_base/global_costmap/laser_scan_sensor/marking: True
 * /move_base/global_costmap/laser_scan_sensor/sensor_frame: laser
 * /move_base/global_costmap/laser_scan_sensor/topic: scan
 * /move_base/global_costmap/observation_sources: laser_scan_sensor...
 * /move_base/global_costmap/obstacle_range: 2.5
 * /move_base/global_costmap/point_cloud_sensor/clearing: True
 * /move_base/global_costmap/point_cloud_sensor/data_type: PointCloud2
 * /move_base/global_costmap/point_cloud_sensor/marking: True
 * /move_base/global_costmap/point_cloud_sensor/sensor_frame: cloud
 * /move_base/global_costmap/point_cloud_sensor/topic: cloud
 * /move_base/global_costmap/publish_frequency: 2.0
 * /move_base/global_costmap/raytrace_range: 3.0
 * /move_base/global_costmap/robot_base_frame: base_link
 * /move_base/global_costmap/static_map: True
 * /move_base/global_costmap/transform_tolerance: 0.5
 * /move_base/global_costmap/update_frequency: 5.0
 * /move_base/local_costmap/footprint: [[0.13, 0.24], [0...
 * /move_base/local_costmap/global_frame: odom
 * /move_base/local_costmap/height: 6.0
 * /move_base/local_costmap/inflation_radius: 0.2
 * /move_base/local_costmap/laser_scan_sensor/clearing: True
 * /move_base/local_costmap/laser_scan_sensor/data_type: LaserScan
 * /move_base/local_costmap/laser_scan_sensor/marking: True
 * /move_base/local_costmap/laser_scan_sensor/sensor_frame: laser
 * /move_base/local_costmap/laser_scan_sensor/topic: scan
 * /move_base/local_costmap/observation_sources: laser_scan_sensor...
 * /move_base/local_costmap/obstacle_range: 2.5
 * /move_base/local_costmap/point_cloud_sensor/clearing: True
 * /move_base/local_costmap/point_cloud_sensor/data_type: PointCloud2
 * /move_base/local_costmap/point_cloud_sensor/marking: True
 * /move_base/local_costmap/point_cloud_sensor/sensor_frame: cloud
 * /move_base/local_costmap/point_cloud_sensor/topic: cloud
 * /move_base/local_costmap/publish_frequency: 2.0
 * /move_base/local_costmap/raytrace_range: 3.0
 * /move_base/local_costmap/resolution: 0.05
 * /move_base/local_costmap/robot_base_frame: base_link
 * /move_base/local_costmap/rolling_window: True
 * /move_base/local_costmap/static_map: False
 * /move_base/local_costmap/transform_tolerance: 0.5
 * /move_base/local_costmap/update_frequency: 5.0
 * /move_base/local_costmap/width: 6.0
 * /rosdistro: noetic
 * /rosversion: 1.16.0

NODES
  /
    amcl (amcl/amcl)
    base_footprint_to_base_link (tf/static_transform_publisher ...