Question regarding nginx plus gpg key

Hi Everyone,

I'm trying to install the Nginx Plus on my ubuntu lab. I followed the nginx article to set up my lab environment, including setting up the gpg key, and get the valid nginx signed key from our F5 sale representative for lab tesing. 

 https://docs.nginx.com/nginx/admin-guide/installing-nginx/installing-nginx-plus/#install_debian_ubuntu

I got the error message after running apt update. It indicates that the repotitory is not signed.

Reading package lists... Done
E: Failed to fetch https://pkgs.nginx.com/plus/ubuntu/dists/jammy/InRelease  400  Bad Request [IP: 18.198.212.80 443]
E: The repository 'https://pkgs.nginx.com/plus/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(8) manpage for repository creation and user configuration details.

Has anyone got this issue like this ? Does anyone know how I can fix this issue ?

Best regards,

Ding