Gazebo not publishing robot topics

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Hello, I'm trying to use gazebo with ros-kinetic, but when I run, for example, roslaunch turtlebot3_gazebo turtlebot3_empty_world.launch, gazebo launches normally with the robot in the world, but the output of rostopic is:

    /clock
    /gazebo/link_states
    /gazebo/model_states
    /gazebo/parameter_descriptions
    /gazebo/parameter_updates
    /gazebo/set_link_state
    /gazebo/set_model_state
    /gazebo_gui/parameter_descriptions
    /gazebo_gui/parameter_updates
    /rosout
    /rosout_agg

With all robot topics missing (odom,cmd_vel,scan,tf,etc).

This has happened to me before and I only solved it by reinstalling everything ROS-related.

Any idea what might be causing this?