I am trying to start working with gazebo, but the example from the Get Started section doesn't seem to work.

I am using Ubuntu 20.04 and installed gazebo11 via the full desktop install of ROS Noetic.

Launching Gazebo by itself by just typing gazebo in the command line works.

However the command gazebo worlds/pioneer2dx.world doesn't. The only thing that shows up is the program banner and nothing happens.

I saw this post and it suggested to execute the command with the verbose option. When I do that, the output looks like this:

It was also suggested that I should try loading a different world like shapes.world and that works just fine

What's going wrong here?