Issue

Robot doesn't move when it's supposed to.

I'm on Fortress tutorial run https://ignitionrobotics.org/docs/for.... Starting Ign sheds some errors.

$ ign gazebo building_robot.sdf -v
[Msg] Ignition Gazebo Server v6.0.0~pre1                                                                               
[Msg] Ignition Gazebo GUI    v6.0.0~pre1                  
[Msg] Loading SDF world file[/home/n130s/data/Dropbox/pg/myDevelopment/git_repo/ROS/cws_utakata/src/ignitionrobotics/docs/fortress/tutorials/building_robot/building_robot.sdf].
[Msg] Create service on [/world/car_world/create]                                                                      
[Msg] Remove service on [/world/car_world/remove]    
[Msg] Pose service on [/world/car_world/set_pose]                                                                      
[Msg] Light configuration service on [/world/car_world/light_config]
[Msg] Physics service on [/world/car_world/set_physics]                                                                
[Msg] SphericalCoordinates service on [/world/car_world/set_spherical_coordinates]
[Msg] Enable collision service on [/world/car_world/enable_collision]
[Msg] Disable collision service on [/world/car_world/disable_collision]
[Msg] Loaded level [3]                                                                                                 
[Msg] Serving world controls on [/world/car_world/control] and [/world/car_world/playback/control]
[Msg] Serving GUI information on [/world/car_world/gui/info]  
[Msg] World [car_world] initialized with [1ms] physics profile.               
[Msg] Serving world SDF generation service on [/world/car_world/generate_world_sdf]                                                                                                                                                           
[Msg] Serving world names on [/gazebo/worlds]                                                                                                                                                                                                 
[Msg] Resource path add service on [/gazebo/resource_paths/add].
[Msg] Resource path get service on [/gazebo/resource_paths/get].                                                                                                                                                                              
[Msg] Resource paths published on [/gazebo/resource_paths].
[GUI] [Wrn] [Application.cc:669] [QT] file:///usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Dialogs/DefaultFileDialog.qml:102:33: QML Settings: Failed to initialize QSettings instance. Status code is: 1
[GUI] [Wrn] [Application.cc:669] [QT] file:///usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Dialogs/DefaultFileDialog.qml:102:33: QML Settings: The following application identifiers have not been set: QVector("organizationName", "organizationD
omain")                                                                                                                
[GUI] [Wrn] [Application.cc:669] [QT] file:///usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Dialogs/DefaultFileDialog.qml:102:33: QML Settings: Failed to initialize QSettings instance. Status code is: 1
[GUI] [Wrn] [Application.cc:669] [QT] file:///usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Dialogs/DefaultFileDialog.qml:102:33: QML Settings: The following application identifiers have not been set: QVector("organizationName", "organizationD
omain")                                                                                                                                                                                                                                       
[GUI] [Wrn] [Application.cc:669] [QT] file::/Gazebo/GazeboDrawer.qml:147:3: QML Dialog: Binding loop detected for property "implicitHeight"
[GUI] [Wrn] [Application.cc:669] [QT] file:///usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Dialogs/DefaultFileDialog.qml:102:33: QML Settings: Failed to initialize QSettings instance. Status code is: 1
[GUI] [Wrn] [Application.cc:669] [QT] file:///usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Dialogs/DefaultFileDialog.qml:102:33: QML Settings: The following application identifiers have not been set: QVector("organizationName", "organizationD
omain")                                              
[GUI] [Wrn] [Application.cc:669] [QT] file::/Gazebo/GazeboDrawer.qml:147:3: QML Dialog: Binding loop detected for property "implicitHeight"
[GUI] [Msg] Loading config [/home/n130s/.ignition/gazebo/gui.config]
[GUI] [Wrn] [Scene3D.cc:2910] The GzScene3D plugin is deprecated on v6 and will be removed on v7. Use MinimalScene together with other plugins as needed.
[GUI] [Msg] Video recorder stats topic advertised on [/gui/record_video/stats]
[GUI] [Msg] Transform mode service on [/gui/transform_mode]
[GUI] [Msg] Record video service on [/gui/record_video]
[GUI] [Msg] Move to service on [/gui/move_to]
[GUI] [Msg ...