roslaunch not working on Kwad_gazebo.launch file

[amirrezataherkhani]

this is the output of command "roslaunch fly_bot Kwad_gazebo.launch"

[ WARN] [1604875647.169607851]: The root link base_link1 has an inertia specified in the URDF, but KDL does not support a root link with an inertia.  As a workaround, you can add an extra dummy link to your URDF.
[ INFO] [1604875647.401430521]: Finished loading Gazebo ROS API Plugin.
[ INFO] [1604875647.402080067]: waitForService: Service [/gazebo/set_physics_properties] has not been advertised, waiting...
[ INFO] [1604875647.409483138]: Finished loading Gazebo ROS API Plugin.
[ INFO] [1604875647.409996193]: waitForService: Service [/gazebo/set_physics_properties] has not been advertised, waiting...
[INFO] [1604875647.429486, 0.000000]: Controller Spawner: Waiting for service /Kwad/controller_manager/load_controller
SpawnModel script started
[INFO] [1604875647.849172, 0.000000]: Loading model XML from ros parameter
[INFO] [1604875647.853947, 0.000000]: Waiting for service /gazebo/spawn_urdf_model
[WARN] [1604875677.603979, 0.000000]: Controller Spawner couldn't find the expected controller_manager ROS interface.
[Kwad/control_spawner-5] process has finished cleanly
log file: /home/amirt4/.ros/log/5f8173d8-2214-11eb-b67c-acfdcee01cda/Kwad-control_spawner-5*.log