GPG error: the repository is not signed.

[megretj]

I am trying to access the opensand repositories. However, accessing jammy version of net4sat repositories seems to have ceased to worked since last Friday when it still worked. I tried accessing a previous version with focal, using: echo "deb https://raw.githubusercontent.com/CNES/net4sat-packages/master/ focal stable" | sudo tee /etc/apt/sources.list.d/opensand.list then curl -sS https://raw.githubusercontent.com/CNES/net4sat-packages/master/gpg/net4sat.gpg.key | sudo apt-key add - and it works. When I do the same for the jammy version, it seems there is an error with the gpg key as the following message is shown when running sudo apt update:

W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: https://raw.githubusercontent.com/CNES/net4sat-packages/master/jammy jammy InRelease: Splitting up /var/lib/apt/lists/partial/raw.githubusercontent.com_CNES_net4sat-packages_master_jammy_dists_jammy_InRelease into data and signature failed
W: Failed to fetch https://raw.githubusercontent.com/CNES/net4sat-packages/master/jammy/dists/jammy/InRelease Splitting up /var/lib/apt/lists/partial/raw.githubusercontent.com_CNES_net4sat-packages_master_jammy_dists_jammy_InRelease into data and signature failed

Attempting the same today and got a similar message again:

W: GPG error: https://raw.githubusercontent.com/CNES/net4sat-packages/master/jammy jammy InRelease: Splitting up /var/lib/apt/lists/partial/raw.githubusercontent.com_CNES_net4sat-packages_master_jammy_dists_jammy_InRelease into data and signature failed E: The repository 'https://raw.githubusercontent.com/CNES/net4sat-packages/master/jammy 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(8) manpage for repository creation and user configuration details.

Could you please have a look if you can do anything? Thank you!