xacro file spawn in rviz2 but not in gazebo

[antwoor]

Describe your issue

I wrote a couple of xacro files describing manipulator and mobile platform and connect them. In rviz it shows properelly but not in gazebo.

https://github.com/antwoor/robotics_software_engineer/tree/assignments

Steps to reproduce ( commands you ran - in order )

cd module_3_assignment
colcon build --symlink-install
source install/setup.bash
ros2 launch module_3_assignment task3_gazebo.launch.py

What was the expected result?

[gazebo-5] [INFO] [1733403940.281243679] [gazebo_ros_node]: ROS was initialized without arguments.
[gazebo-5] [Msg] Waiting for master.
[gazebo-5] [Msg] Connected to gazebo master @ http://127.0.0.1:11345
[gazebo-5] [Msg] Publicized address: 192.168.0.73
[gazebo-5] [Err] [InsertModelWidget.cc:403] Missing model.config for model "/home/antwoor/moveit_ws/src/stone/config"
[gazebo-5] [Err] [InsertModelWidget.cc:403] Missing model.config for model "/home/antwoor/moveit_ws/src/stone/launch"
[gazebo-5] [Err] [InsertModelWidget.cc:403] Missing model.config for model "/home/antwoor/moveit_ws/src/stone/meshes"
[gazebo-5] [Err] [InsertModelWidget.cc:403] Missing model.config for model "/home/antwoor/moveit_ws/src/stone/urdf"
[spawn_entity.py-6] [INFO] [1733403940.674543183] [spawn_robot]: Calling service /spawn_entity
[gazebo-5] [Msg] Waiting for master.
[gazebo-5] [Msg] Connected to gazebo master @ http://127.0.0.1:11345
[gazebo-5] [Msg] Publicized address: 192.168.0.73
[gazebo-5] [Msg] Loading world file [/usr/share/gazebo-11/worlds/empty.world]
[gazebo-5] [Err] [Model.cc:123] Error Code 23 Msg: FrameAttachedToGraph error, Non-LINK vertex with name [model] is disconnected; it should have 1 outgoing edge in MODEL attached_to graph.
[gazebo-5] [Err] [Model.cc:123] Error Code 23 Msg: Graph with model scope has sink vertex named [model] when starting from vertex with name [model], which is not permitted.
[spawn_entity.py-6] [INFO] [1733403940.905351834] [spawn_robot]: Spawn status: SpawnEntity: Successfully spawned entity [combo_bot]

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