Issue error occurred during the signature verification

[Muster]

Server operating system version

Ubuntu 24.04.2 LTS

Plesk version and microupdate number

Plesk Obsidian 18.0.67 Update #3

Hey everyone,
I have plesk in autoupdate mode and it keeps sending me this email of a failed update.

2025-05-31 06:26:04 INFO: pum is called with arguments: ['--list', '--repo-info', '--json']
/usr/lib/python3/dist-packages/apt/cache.py:562: Warning: W:An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://autoinstall.plesk.com/pool/PSA_18.0.67_16409 noble InRelease: The following signatures were invalid: 8BADC1A02FC9C07FB8C20EC0BD11A6AA914BDF7E (untrusted public key algorithm: dsa1024), W:An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://autoinstall.plesk.com/PHP74_17 noble InRelease: The following signatures were invalid: 8BADC1A02FC9C07FB8C20EC0BD11A6AA914BDF7E (untrusted public key algorithm: dsa1024), W:Failed to fetch http://autoinstall.plesk.com/pool/PSA_18.0.67_16409/dists/noble/InRelease The following signatures were invalid: 8BADC1A02FC9C07FB8C20EC0BD11A6AA914BDF7E (untrusted public key algorithm: dsa1024), W:Failed to fetch http://autoinstall.plesk.com/PHP74 _17/dists/noble/InRelease The following signatures were invalid: 8BADC1A02FC9C07FB8C20EC0BD11A6AA914BDF7E (untrusted public key algorithm: dsa1024), W:Some index files failed to download. They have been ignored, or old ones used instead.
res = self._cache.update(fetch_progress, slist, pulse_interval)
2025-05-31 06:26:07 ERROR: Apt cache fetch failed. Try to run the `apt-get update` command.
2025-05-31 06:26:07 ERROR:
2025-05-31 06:26:07 ERROR: Exited with returncode 1.

 

[Sebahat.hadzhi]

Hello, @Muster . Our team is currently reviewing the case and I will follow up with more details as soon as possible.

 

[Nelly]

Any news on this, i`m getting the same error updated from 18.0.69

2025-06-02 06:28:21 INFO: pum is called with arguments: ['--list', '--repo-info', '--json']
/usr/lib/python3/dist-packages/apt/cache.py:562: Warning: W:An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: Index of /grafana/deb stable InRelease: The following signatures were invalid: 8BADC1A02FC9C07FB8C20EC0BD11A6AA914BDF7E (untrusted public key algorithm: dsa1024), W:Failed to fetch https://autoinstall.plesk.com/grafana/deb/dists/stable/InRelease The following signatures were invalid: 8BADC1A02FC9C07FB8C20EC0BD11A6AA914BDF7E (untrusted public key algorithm: dsa1024), W:Some index files failed to download. They have been ignored, or old ones used instead.
res = self._cache.update(fetch_progress, slist, pulse_interval)
2025-06-02 06:28:22 ERROR: Apt cache fetch failed. Try to run the `apt-get update` command.
2025-06-02 06:28:22 ERROR:
2025-06-02 06:28:22 ERROR: Exited with returncode 1.

 

[Ash155]

Hi all,

Same issue here... but for Imunify360.

2025-06-02 06:25:27 INFO: pum is called with arguments: ['--list', '--repo-info', '--json']
/usr/lib/python3/dist-packages/apt/cache.py:562: Warning: W:An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: Index of /imunify360/ubuntu/24.04/ noble InRelease: The following signatures were invalid: 9EE467641C635726A184D64B8C55A6628608CB71 (untrusted public key algorithm: dsa1024), W:An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: Index of /ubuntu/24.04/slot-1/ noble InRelease: The following signatures were invalid: 9EE467641C635726A184D64B8C55A6628608CB71

And when I try to check for package updates in Plesk I get 'Error: Unable to receive update information for the package(s)'.

Total newbie here but wondering if the apt update list cache needs to be cleared? Don't want to try it until someone who knows what they are doing advises!

Thanks!

 

[lemoneye]

I have the same issue on several servers too.

 

[yohanr]

Same issue here after updating to 18.0.69 and 18.0.70 now - Plesk Obsidian v18.0.70_build1800250523.14 os_Ubuntu 24.04

 

[_member_]

same here with fresh installed

Plesk Obsidian 18.0.70 on Ubuntu 24.04.2 LTS​

 

[Sebahat.hadzhi]

Regarding the PHP 7.4 and PHP 8.0 warnings, the workaround we can suggest is:

echo 'APT::Key::Assert-Pubkey-Algo ">=rsa2048,ed25519,ed448,dsa1024";' | sudo tee /etc/apt/apt.conf.d/99weakkey-warning

However, please do proceed with caution as the action can impact the overall security of the system. Our team is already working on releasing a fix. I will follow up with more details.

 

[3rKaN_BRATTE]

I also have the same issue

 

[rammstein]

Same Problem here

Plesk Obsidian 18.0.69 Update 3
Ubuntu 24.04.2 LTS

 

[JonasW03]

Same Problem:
Plesk Obsidian 18.0.69 Update #3
Ubuntu 24.04.2 LTS

 

[elChupete]

and another one ...

 

[elChupete]

anyone else on a STRATO VPS Linux V server which recently has been moved to new hardware?
I think the error started to occur after VM was moved to new hardware