Issue Docker Extension Installation Fails on Plesk (Debian 11.11)

[MartMlr]

Server operating system version

Debian 11.1

Plesk version and microupdate number

Plesk Obsidian 18.0.72 Update #3 Web Host Edition

Hi everyone,

I’m trying to install the Docker extension in Plesk on a server running Debian 11.11, but the installation keeps failing with the following error message:

[2025-10-23 12:18:35.438] 193971:68fa00f6ba168 ERR [extension/docker] The execution of post-install.php has failed with the following message:Execution installer has failed with exit code 1, stdout: , stderr: Cannot enable deb repository required for Docker engineThe execution of post-install.php has failed with the following message:Execution installer has failed with exit code 1, stdout: , stderr: Cannot enable deb repository required for Docker engine

Any help or insights would be greatly appreciated.

Thanks in advance! Martin

 

[Sebahat.hadzhi]

Hi, Martin. Could you please try the workaround suggested in this thread:

• Question - Error when installing Docker extension

If the issue still persists, please let us know if there are any additional entries logged at /var/log/plesk/panel.log.