When i want to launch bb_8_gazebo it give me this error

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Hello!

I installed bb_8 package and when i tried to launch gazebo file (roslaunch bb_8_gazebo main_empty.launch) and it give me this error:

[gazebo-2] process has died [pid 5389, exit code 127, cmd /opt/ros/kinetic/lib/gazebo_ros/gzserver -u -e ode worlds/empty.world __name:=gazebo __log:=/home/ovidiu/.ros/log/ac82f6f0-e397-11e9-812f-4cedfb124076/gazebo-2.log].
log file: /home/ovidiu/.ros/log/ac82f6f0-e397-11e9-812f-4cedfb124076/gazebo-2*.log

Can someone help me?