Where is State_Publisher Node?

[EllaHayashiIndro]

Trying to launch the Gazebo simulation for Hunter. Getting error:

ERROR: cannot launch node of type [robot_state_publisher/state_publisher]: Cannot locate node of type [state_publisher] in package [robot_state_publisher]. Make sure file exists in package path and permission is set to executable (chmod +x)

Do you know why I am getting this error? Where is the state_publisher node located in the downloaded git files?

[agilexrobotics]

Make sure robot_state_publisher is installed Download method: sudo apt-get install ros-melodic-robot-state-publisher