403 response on zymkey apt repositories

Hi.
I am getting a 403 (forbidden) error while trying to add the APT repositories in the zymkey install script. Is this something with my setup/network/country or is there an issue with the AWS host?

My setup for context:
I am using this install script: https://zk-sw-repo.s3.amazonaws.com/apt-repo-bookworm
From this getting started guide: ZYMKEY4: Quickstart and Integration |
Hardware: raspberry pi zero 2
Hat: zymkey 4i
OS: Rasibian bookworm lite 32-bit (fresh install)
Region: UK

Here is the logs from the install script:

~ $ curl -G https://s3.amazonaws.com/zk-sw-repo/install_zk_sw.sh | sudo bash
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100  8463  100  8463    0     0  14950      0 --:--:-- --:--:-- --:--:-- 14978
Installing prerequisites (this might take a few minutes)...Hit:1 http://raspbian.raspberrypi.com/raspbian bookworm InRelease
Hit:2 http://archive.raspberrypi.com/debian bookworm InRelease
Err:3 https://zk-sw-repo.s3.amazonaws.com/apt-repo-bookworm bookworm InRelease
  403  Forbidden [IP: 16.15.202.41 443]
Reading package lists...
E: Failed to fetch https://zk-sw-repo.s3.amazonaws.com/apt-repo-bookworm/dists/bookworm/InRelease  403  Forbidden [IP: 16.15.202.41 443]
E: The repository 'https://zk-sw-repo.s3.amazonaws.com/apt-repo-bookworm bookworm InRelease' is not signed.
W: http://raspbian.raspberrypi.com/raspbian/dists/bookworm/InRelease: Key is stored in legacy trusted.gpg keyring (/etc/apt/trusted.gpg), see the DEPRECATION section in apt-key(8) for details.
Reading package lists...
Building dependency tree...
Reading state information...
libboost-thread-dev is already the newest version (1.74.0.3+b4).
lsb-release is already the newest version (12.0-1).
0 upgraded, 0 newly installed, 0 to remove and 30 not upgraded.
Distro set to: bookworm
gpio:x:993:ethicronics
Reading package lists...
Building dependency tree...
Reading state information...
apt-transport-https is already the newest version (2.6.1).
curl is already the newest version (7.88.1-10+rpi1+deb12u14).
libyaml-dev is already the newest version (0.2.5-1).
libssl-dev is already the newest version (3.0.18-1~deb12u1+rpt1).
libcurl4-openssl-dev is already the newest version (7.88.1-10+rpi1+deb12u14).
python3-pip is already the newest version (23.0.1+dfsg-1+rpt1).
python3-setuptools is already the newest version (66.1.1-1+deb12u2).
python3-pycurl is already the newest version (7.45.2-3).
i2c-tools is already the newest version (4.3-2+b2).
0 upgraded, 0 newly installed, 0 to remove and 30 not upgraded.
Looking in indexes: https://pypi.org/simple, https://www.piwheels.org/simple
Requirement already satisfied: inotify in /usr/local/lib/python3.11/dist-packages (0.2.12)
Requirement already satisfied: progress in /usr/local/lib/python3.11/dist-packages (1.6.1)
Requirement already satisfied: python-gnupg in /usr/local/lib/python3.11/dist-packages (0.5.6)
Requirement already satisfied: build in /usr/local/lib/python3.11/dist-packages (from inotify) (1.4.0)
Requirement already satisfied: packaging>=24.0 in /usr/local/lib/python3.11/dist-packages (from build->inotify) (26.0)
Requirement already satisfied: pyproject_hooks in /usr/local/lib/python3.11/dist-packages (from build->inotify) (1.2.0)
WARNING: Running pip as the 'root' user can result in broken permissions and conflicting behaviour with the system package manager. It is recommended to use a virtual environment instead: https://pip.pypa.io/warnings/venv
done.
Importing Zymbit Packages gpg key... done.
Installing /etc/apt/sources.list.d/zymbit.list...done...Updating now.
Hit:1 http://raspbian.raspberrypi.com/raspbian bookworm InRelease
Hit:2 http://archive.raspberrypi.com/debian bookworm InRelease
Err:3 https://zk-sw-repo.s3.amazonaws.com/apt-repo-bookworm bookworm InRelease
  403  Forbidden [IP: 16.15.183.112 443]
Reading package lists...
E: Failed to fetch https://zk-sw-repo.s3.amazonaws.com/apt-repo-bookworm/dists/bookworm/InRelease  403  Forbidden [IP: 16.15.183.112 443]
E: The repository 'https://zk-sw-repo.s3.amazonaws.com/apt-repo-bookworm bookworm InRelease' is not signed.
W: http://raspbian.raspberrypi.com/raspbian/dists/bookworm/InRelease: Key is stored in legacy trusted.gpg keyring (/etc/apt/trusted.gpg), see the DEPRECATION section in apt-key(8) for details.
Installing Zymkey Packages...Reading package lists...
Building dependency tree...
Reading state information...
E: Unable to locate package libzymkeyssl
E: Unable to locate package zkbootrtc
E: Unable to locate package zkifc
E: Unable to locate package zkapputilslib
E: Unable to locate package zksaapps
E: Unable to locate package zkpkcs11

Any help would be welcome! I would install these manually, but I cannot find sources for them.

Okay so I’ve actually answered my own question. No recent operating system seems to be supported on the raspberry pi zero. While this is somewhat disappointing, I hope a new version comes out with the zymkey 5.