Hi, I am trying to create a simple two-wheeled robot in Ignition using a xacro description file. I intend to spawn this robot with a lidar and a camera sensor and for both of each I use the plugin named "ignition::gazebo::systems::Sensors". The sensors are added to the robot xacro via macros, which contain the following snipets of code:

<gazebo reference="cam_front">
        <sensor name='${name}' type='camera'>
            <pose>${body_dim_x/2} 0 ${body_dim_z/2} 0 0 0</pose>
            <visualize>true</visualize>
            <update_rate>5</update_rate>
            <topic>${name}/camera_image</topic>
            <camera>
                <!-- <horizontal_fov>1.047</horizontal_fov> -->
                <image>
                    <!-- <width>320</width>
                    <height>240</height> -->
                    <width>640</width>
                    <height>420</height>
                    <!-- <format>B8G8R8</format> -->
                </image>
                <!-- <clip>
                    <near>0.1</near>
                    <far>100</far>
                </clip> -->
            </camera>


            <plugin filename="libignition-gazebo-camera-video-recorder-system.so" name="ignition::gazebo::systems::CameraVideoRecorder">
            </plugin>
        </sensor>
    </gazebo>

---

<gazebo reference="base_lidar">
        <sensor name="${name}" type='gpu_lidar'>
            <pose>0 0 ${body_height*0.6} 0 0 0</pose>
            <!-- <pose>0 0 1.0 0 0 0</pose> -->
            <topic>${name}/lidar</topic>
            <update_rate>10</update_rate>
            <ray>
                <scan>
                    <horizontal>
                        <!-- <samples>90</samples> -->
                        <samples>10</samples>
                        <resolution>1</resolution>
                        <min_angle>${-radians(20)}</min_angle>
                        <max_angle>${radians(20)}</max_angle>
                    </horizontal>
                    <vertical>
                        <samples>10</samples>
                        <resolution>1</resolution>
                        <min_angle>${-radians(10)}</min_angle>
                        <max_angle>${radians(10)}</max_angle>
                    </vertical>
                </scan>
                <range>
                    <!-- <min>0.08</min> -->
                    <min>0.1</min>
                    <max>2.0</max>
                    <resolution>0.01</resolution>
                </range>
            </ray>
            <always_on>1</always_on>
            <visualize>true</visualize>

            <plugin filename="libignition-gazebo-sensors-system.so" name="ignition::gazebo::systems::Sensors">
                <render_engine>ogre</render_engine>
            </plugin>
        </sensor>
    </gazebo>

When I try to spawn the robot with each sensor separately, they work correctly, as it can be seen in the image below.

However when both of the sensors are included in the xacro, the simulator crashes and displays the following error:

Could someone help me find what is causing this issue?

Gratefully, Lucas