PluginlibFactory: The plugin for class 'rtabmap_ros/MapGraph' failed to load. Error: According to the loaded plugin descriptions the class rtabmap_ros/MapGraph with base class type rviz::Display does not exist.

[Leslie-Jane]

I ran into this issue after downloading a navigation package and following the Readme file to execute the mapping command。By the way,it didn't work though I had install rtabmap-rviz packages.