Issue with Clearsigned File and NOSPLIT Error during Repository Update

Hello,

I hope this message finds you well. I am experiencing an issue when trying to update the AdoptOpenJDK repository on my Debian 10 (buster) system.

The error message I am encountering is as follows:

`Err:6 https://adoptopenjdk.jfrog.io/adoptopenjdk/deb buster InRelease
Clearsigned file is not valid, received 'NOSPLIT' (does the network require authentication?)
Paket lists are being read... Done
E: Failed to fetch https://adoptopenjdk.jfrog.io/adoptopenjdk/deb/dists/buster/InRelease Clearsigned file is not valid, received 'NOSPLIT' (does the network require authentication?)
E: The repository 'https://adoptopenjdk.jfrog.io/adoptopenjdk/deb buster InRelease' is no longer signed.
N: Updating from such a repository cannot be done securely, and it is disabled by default.
N: For more details, see the apt-secure(8) manual page.
`

I followed the installation guide provided at: [Adoptium Blog - Eclipse Temurin Linux Installers](https://adoptium.net/de/blog/2021/12/eclipse-temurin-linux-installers-available/)

Despite my efforts, the problem persists. It seems to be related to a Clearsigned file issue with a 'NOSPLIT' error.

Could you kindly assist me in resolving this matter? If there are specific steps or changes to the approach that I should follow, please provide guidance.

Thank you in advance for your support.

The report names Debian 10, the AdoptOpenJDK repository URL, and the Eclipse Temurin Linux Installers guide, but no source file or test. Start by reviewing the guide and reproducing the apt update error; done requires a confirmed installation or repository fix that removes the NOSPLIT error, with guidance updated if the approach has changed.

Written by the indexing model from the issue text.