/controller_manager encountered problems

[hhz0328]

/controller_manager encountered problems

[hhz0328]

I'm not sure if there is some preprocessing that needs to be done before launching the launch file

[hhz0328]

There are also some errors reported at the beginning of the launch file run:

[spawn_entity.py-4] warnings.warn(
[spawn_entity.py-4] [INFO] [1705917084.118742338] [spawn_entity]: Waiting for entity xml on robot_description
[spawn_entity.py-4] [INFO] [1705917084.129722341] [spawn_entity]: Waiting for service /spawn_entity, timeout = 30
[spawn_entity.py-4] [INFO] [1705917084.129964789] [spawn_entity]: Waiting for service /spawn_entity

[hhz0328]

I have solved it.
I had a problem installing the gazebo plugin earlier. You should install gazebo first, then gazebo-ros2-control, and finally gazebo-ros-pkgs. installing them in the order of the readme docs would have prevented the error!