Example tracked_vehicle_simple.world robot not moving

[Rob-Dawson]

Environment

• OS Version: Newly installed Ubuntu 20.04 (Virtual Machine)
• Fresh installation of Gazebo 11

Description

• Expected behavior: Looking at the .world file, the simulated robot should move around using "wasd" or the arrow keys
• Actual behavior: When pressing these keys, nothing happens. I have started numerous other example worlds which also use the keyboard and these seem to work correctly. I believe the problem lies with the libSimpleTrackedVehiclePlugin.

Everything is newly installed with no changes to libraries.
I am aware that getting the simulation working in Gazebo Ignition (Fortress) required DART 6.13. I believe the Gazebo Classic version only uses ODE. Could it be I need to install a different version of ODE?

Steps to reproduce

1. Install gazebo 11
2. Run gazebo worlds/tracked_vehicle_simple.world. This will load the simulation with a tracked robot
3. Attempt to move forward with arrow keys