**[Original report](https://bitbucket.org/chapulina/simslides/issue/12) by Louise Poubel (Bitbucket: [chapulina](https://bitbucket.org/chapulina), GitHub: [chapulina](https://github.com/chapulina)).** ----------------------------------------  After seeing this message, I go and install what's needed, but then I need to restart Gazebo to try again.