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ERROR: cannot launch node of type [robot_state_publisher/state_publisher]: can't locate node [state_publisher] in package [robot_state_publisher]
ERROR: cannot launch node of type [rviz/rviz]: can't locate node [rviz] in package [rviz]
Traceback (most recent call last):
  File "/Users/Jackson/ros_catkin_ws/src/robot_model/joint_state_publisher/joint_state_publisher/joint_state_publisher", line 5, in <module>
    import wx
ImportError: No module named wx

Just making sure: have you sourced the correct setup.bash / workspace? These error messages point to some issues with the environment you are trying to start the launch file in (not being able to find rviz fi).