Cannot bash

Hello everyone !! I have install Px4 simulation for Ubuntu follow this guide:

But when i run this command:

bash ./PX4-Autopilot/Tools/setup/

The error occur like the img below:

Please give me some advice !! tks a lot !!!

One of your ppa addresses is not available? Maybe it was a temporary issue and it’s back now? Or maybe that’s no longer available and you need to remove that line/file from /etc/apt/sources.list or /etc/apt/sources.list.d/...?