A error thrown by gaserver when run sitl_gazebo

Hello everyone, I am new to px4,though it can run successfully before, But I got this error now:

gzserver: symbol lookup error: /home/wzy/src/Firmware/build/px4_sitl_default/build_gazebo/libgazebo_multirotor_base_plugin.so: undefined symbol: _ZN8mav_msgs4msgs10MotorSpeedC1Ev

After I open gazebo ,it seems normal.

But when I launch my model , px4 and mavros in a launch file below, I got this error.
I see some help in gazebo, I even reinstall my ~/src/Firmware
But it is not work for me ,thanks for any help!!!

my launch

    <arg name="vehicle" default="iris"/>
    <!--<arg name="my_model" default="my_iris_fpv_lidar"/>-->
    <arg name="my_model" default="iris"/>
    <arg name="sdf" default="$(find mavlink_sitl_gazebo)/models/$(arg my_model)/$(arg my_model).sdf"/>
    <arg name="est" default="ekf2"/>
    <env name="PX4_SIM_MODEL" value="$(arg vehicle)" />
    <env name="PX4_ESTIMATOR" value="$(arg est)" />
    <node name="plane" pkg="gazebo_ros" type="spawn_model" output="screen" args="-sdf -file $(arg sdf) -model $(arg vehicle) -x 1 -y 1 -z 0 -R 0 -P 0 -Y 0"/>

    <arg name="fcu_url" default="udp://:14540@"/>
    <arg name="respawn_mavros" default="false"/>
    <!-- PX4 configs -->
    <arg name="interactive" default="true"/>
    <arg unless="$(arg interactive)" name="px4_command_arg1" value="-d"/>
    <arg     if="$(arg interactive)" name="px4_command_arg1" value=""/>
    <node name="sitl" pkg="px4" type="px4" output="screen"
          args="$(find px4)/ROMFS/px4fmu_common -s etc/init.d-posix/rcS $(arg px4_command_arg1)" required="true"/>

    <!-- MAVROS -->
    <!-- GCS link is provided by SITL -->
    <arg name="gcs_url" value=""/>
<!--    <arg name="fcu_url" value="$(arg fcu_url)"/>-->
    <arg name="tgt_system" default="1" />
    <arg name="tgt_component" default="1" />
    <arg name="log_output" default="screen" />
    <arg name="fcu_protocol" default="v2.0" />
    <!--<arg name="respawn_mavros" default="false" />-->
    <arg name="pluginlists_yaml" value="$(find mavros)/launch/px4_pluginlists.yaml" />
    <arg name="config_yaml" value="$(find mavros)/launch/px4_config.yaml" />
    <!-- mavros node.launch-->
    <node pkg="mavros" type="mavros_node" name="mavros" required="$(eval not respawn_mavros)" clear_params="true" output="$(arg log_output)" respawn="$(arg respawn_mavros)">
        <param name="fcu_url" value="$(arg fcu_url)" />
        <param name="gcs_url" value="$(arg gcs_url)" />
        <param name="target_system_id" value="$(arg tgt_system)" />
        <param name="target_component_id" value="$(arg tgt_component)" />
        <param name="fcu_protocol" value="$(arg fcu_protocol)" />

        <!-- load blacklist, config -->
        <rosparam command="load" file="$(arg pluginlists_yaml)" />
        <rosparam command="load" file="$(arg config_yaml)" />