Hello! Im having alot of issues installing IoT open on my rasperry pi 3b+, im following this guide

https://github.com/mrejas/rpi-edge-client.sh/blob/main/iotopen-lynx-edge-client.sh
and ive also tried https://forum.iotopen.se/d/534-install-iot-open-components-on-raspberry-pi

but nothing works. Below is the errors im encountering so far

Good:2 http://deb.debian.org/debian bookworm InRelease
Good:3 http://deb.debian.org/debian-security bookworm-security InRelease
Good:4 http://archive.raspberrypi.com/debian bookworm InRelease
Good:5 http://deb.debian.org/debian bookworm-updates InRelease
Reading:1 https://pkg.iotopen.se/apt bullseye InRelease
Error:1 https://pkg.iotopen.se/apt bullseye InRelease
Plaintext signed file is invalid, got 'NOSPLIT' (does the network require authentication?)
Reading package lists… Done
E: Failed to fetch http://pkg.iotopen.se/apt/dists/bullseye/InRelease Plaintext signed file is invalid, got 'NOSPLIT' (does the network require authentication?)
E: The repository 'http://pkg.iotopen.se/apt bullseye InRelease' is not signed.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
IoT Open is trusted, Good.
Repositories already set up, Good.
Reading package lists… Done
Building dependency tree… Done
Reading state information… Done
E: Unable to locate package iotopen-rt
E: Unable to locate package iotopen-edge
E: Unable to locate package scheduler
E: Unable to locate package iotopen-verify
iotopen.json exists. Good.
sudo: iotopen-verify: command not found
sudo: /etc/init.d/mosquitto: command not found

No idea how to fix them, and im wondering why it is such a huge problem to install a app on the rasperri 🙁

Would appreciate help! Thanks.