Building PX4 After Installing ROS/Gazebo/MAVROS

ROS / MAVROS / MicroDDS
1

I am following the steps for initial set up for PX4 using ROS, Gazebo, and MAVROS. I am following the youtube video: 🚀 PX4 MAVROS Python Tutorial (Part 2) - YouTube

I get the PX4 console to partially display but then see the following:

Screen Shot 2021-11-04 at 4.15.47 PM
Screen Shot 2021-11-04 at 4.15.47 PM2354×1094 304 KB

I believe the issue is that for ROS, Gazebo, and MAVROS, we need to use Ubuntu 18.04. It seems that a lot of the PX4 features don’t work on this version Ubuntu, including jmavsim and QGroundControl.

If I want to keep learning how to use PX4 with ROS, Gazebo, and MAVROS, what are my next steps?

Thanks in advance!