top level must be a YAML sequence error in ROS2 even with YAML being a sequence

Question

This YAML file is being passed into the ros_gz_bridge parameter_bridge as a config_file and I am getting an error saying: Could not parse config, top level must be a YAML sequence

Is there something wrong with the layout of this YAML file? Even when I try to submit the test YAML config file that is in the documentation I still get the error.

    - topic_name: "lidar"
      ros_type_name: "sensor_msgs/msg/LaserScan"
      gz_type_name: "gz.msgs.LaserScan"
    
    - topic_name: "cmd_vel"
      ros_type_name: "geometry_msgs/msg/Twist"
      gz_type_name: "gz.msgs.Twist"
    
    - topic_name: "imu"
      ros_type_name: "sensor_msgs/msg/Imu"
      gz_type_name: "gz.msgs.IMU"
    
    - topic_name: "navsat"
      ros_type_name: "sensor_msgs/msg/NavSatFix"
      gz_type_name: "gz.msgs.NavSat"
    
    - topic_name: "navsat"
      ros_type_name: "sensor_msgs/msg/NavSatFix"
      gz_type_name: "gz.msgs.NavSat"
    
    - ros_topic_name: "odometry"
      gz_topic_name: "model/f1tenth/odometry"
      ros_type_name: "nav_msgs/msg/Odometry"
      gz_type_name: "gz.msgs.Odometry"
    
    - ros_topic_name: "tf"
      gz_topic_name: "model/f1tenth/tf"
      ros_type_name: "f2_msgs/msg/TFMessage"
      gz_type_name: "gz.msgs.Pose_V"