I am following this tutorial https://docs.ros.org/en/foxy/Tutorial... when i run the following command:

ign gazebo -v 4 -r visualize_lidar.sdf

i get the following output:

[Wrn] [ign.cc:86] Fuel world download failed because Fetch failed. Other errors Unable to find or download file

why is this happening? how can i run the example?

i installed gazebo11 by following these instructions https://github.com/gazebosim/ros_gz/tree/foxy

i am running foxy on ubuntu 20.04 (via VMware on a mac)