Failed to fetch https://packages.openvpn.net/…/dists/lunar/InRelease 403 Forbidden

I’m running Ubuntu 23.10 on a I9 cpu + Nvidia Geforce RTX 2080 ti and the driver 545 right now. I would like to install the OpenVPN 3 client on my Ubuntu,but I’m not able to install the repository :

This is the guide that I’m following :

https://community.openvpn.net/openvpn/wiki/OpenVPN3Linux

I did several tries :

1)

# apt install apt-transport-https curl
# mkdir -p /etc/apt/keyrings    ### This might not exist in all distributions
# curl -sSfL https://packages.openvpn.net/packages-repo.gpg >/etc/apt/keyrings/openvpn.asc
# echo "deb [signed-by=/etc/apt/keyrings/openvpn.asc] https://packages.openvpn.net/openvpn3/ubuntu lunar main" >>/etc/apt/sources.list.d/openvpn3.list
# apt update

Err:7 https://packages.openvpn.net/openvpn3/ubuntu lunar InRelease
  403  Forbidden [IP: 104.18.110.96 443]
Reading package lists... Done
E: Failed to fetch https://packages.openvpn.net/.../dists/lunar/InRelease  403  Forbidden [IP: 104.18.110.96 443]
E: The repository 'https://packages.openvpn.net/openvpn3/ubuntu lunar 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(manpage for repository creation and user configuration details).

# apt install apt-transport-https curl
# mkdir -p /etc/apt/keyrings    ### This might not exist in all distributions
# curl -sSfL https://packages.openvpn.net/packages-repo.gpg >/etc/apt/keyrings/openvpn.asc
# echo "deb [signed-by=/etc/apt/keyrings/openvpn.asc] https://packages.openvpn.net/openvpn3/debian bookworm main" >>/etc/apt/sources.list.d/openvpn3.list
# apt update

Get:8 https://packages.openvpn.net/openvpn3/debian bookworm/main amd64 Packages [3,996 B]
Fetched 9,833 B in 1s (7,890 B/s)
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
All packages are up to date.
W: Skipping acquire of configured file 'main/binary-i386/Packages' as repository 'https://packages.openvpn.net/openvpn3/debian bookworm InRelease' does not seem to provide it (sources.list entry misspelt?)

# apt install apt-transport-https curl
# mkdir -p /etc/apt/keyrings    ### This might not exist in all distributions
# curl -sSfL https://packages.openvpn.net/packages-repo.gpg >/etc/apt/keyrings/openvpn.asc
# echo "deb [signed-by=/etc/apt/keyrings/openvpn.asc] https://packages.openvpn.net/openvpn3/ubuntu jammy main" >>/etc/apt/sources.list.d/openvpn3.list
# apt update

Err:7 https://packages.openvpn.net/openvpn3/ubuntu jammy InRelease
  403  Forbidden [IP: 104.18.110.96 443]
Reading package lists... Done
E: Failed to fetch https://packages.openvpn.net/.../dists/jammy/InRelease  403  Forbidden [IP: 104.18.110.96 443]
E: The repository 'https://packages.openvpn.net/openvpn3/ubuntu jammy 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(manpage for repository creation and user configuration details).

how ?