[CARTOGRAPHER-ROS] "Submaps: For frame [map]: Frame [map] does not exist"

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Hey, I have tried for a while now to get my Lidar setup to work with Cartographer ROS, with mixed results. I am using 2D lidar exclusively (Hokuyo ust-10lx, no imu).

My current launch files:

<launch>
  <param name="/use_sim_time" value="true" />

  <include file="$(find cartographer_ros)/launch/backpack_2d.launch" />

  <node name="rviz" pkg="rviz" type="rviz" required="true"
      args="-d $(find cartographer_ros)/configuration_files/demo_2d.rviz" />
  <node name="playbag" pkg="rosbag" type="play"
      args="--clock $(arg bag_filename)" />
    <param name="frame_id" value="/base_link"/>
</launch>
<launch>
  <param name="robot_description"
    textfile="$(find cartographer_ros)/urdf/backpack_2d.urdf" />

  <node name="robot_state_publisher" pkg="robot_state_publisher"
    type="robot_state_publisher" />

  <node name="cartographer_node" pkg="cartographer_ros"
      type="cartographer_node" args="
          -configuration_directory $(find cartographer_ros)/configuration_files
          -configuration_basename my_robot.lua"
      output="screen">
    <remap from="echoes" to="horizontal_laser_2d" />
  </node>

  <node name="cartographer_occupancy_grid_node" pkg="cartographer_ros"
      type="cartographer_occupancy_grid_node" args="-resolution 0.05" />
</launch>

and my current lua file:

options = {
      map_builder = MAP_BUILDER,
      trajectory_builder = TRAJECTORY_BUILDER,
      map_frame = "map",
      tracking_frame = "base_link",
      published_frame = "base_link",
      odom_frame = "odom",
      provide_odom_frame = true,
      publish_frame_projected_to_2d = false,
      use_odometry = false,
      use_nav_sat = false,
      use_landmarks = false,
      num_laser_scans = 1,
      num_multi_echo_laser_scans = 0,
      num_subdivisions_per_laser_scan = 1, --10
      num_point_clouds = 0,
      lookup_transform_timeout_sec = 0.2,
      submap_publish_period_sec = 0.3,
      pose_publish_period_sec = 5e-3,
      trajectory_publish_period_sec = 30e-3,
      rangefinder_sampling_ratio = 1.,
      odometry_sampling_ratio = 1.,
      fixed_frame_pose_sampling_ratio = 1.,
      imu_sampling_ratio = 1.,
      landmarks_sampling_ratio = 1.,
    }

    MAP_BUILDER.use_trajectory_builder_2d = true
    TRAJECTORY_BUILDER_2D.num_accumulated_range_data = 1081
    TRAJECTORY_BUILDER_2D.use_imu_data = false;

The rosbag that I am using is (only contains topic laserScan /scan (fixed_frame = base_link): 1: https://1drv.ms/u/s!AlYv1byT4VoNgySe8... This one gives no visual results at all 2: https://1drv.ms/u/s!AlYv1byT4VoNgyUuj... This one gives the result shown below The only difference between the two bags is that the Lidar moves in the first one but remains at the same position in the second one.

When run, cartographer does not give any errors in the terminal, but both submaps and constraints are missing frame map. Pictures of result, rqt_graph and rqt_tf_tree:

If I change the fixed frame name from base_link to map, both the RobotModel and the global status give errors as they require base_link to be present.

My question: What am I missing in my tf connections/cartographer settings?