Installation problem "unable to fetch some archives"

[Azubi24]

What doesn't work?
octodash installation failed with error code "unable to fetch some archieves"

Failed to fetch http://ftp.halifax.rwth-aachen.de/raspbian/raspbian/pool/main/x/xcb-util/libxcb-util0_0.3.8-3+b2_armhf.deb 404 Not found [IP:2a00:8a60:e012:a00::21 80]
Failed to fetch ...

What did you already try?
I try:
sudo apt update
sudo apt upgrade
sudo reboot

General Information:

• Hardware Pi4
• OctoPi Version 0.17.0

Additional context
Add any other context or screenshots about the feature request here.

[Azubi24]

seems to me the ftp server is down / unreachable (?)

[Azubi24]

[Azubi24]

called the installation script several times. Each time one error message less. Now it works.