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root@cubic:~# apt update

Reading package lists... Done
E: Problem executing scripts APT::Update::Post-Invoke-Success 'touch /var/lib/apt/periodic/update-success-stamp 2>/dev/null || true'
E: Sub-process returned an error code

1 Answers1

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check out this issue on the Cubic GitHub page, it seems that the issue is when trying to edit Ubuntu 22.04 (newer) ISO image from an Ubuntu 18.04(older) host, you did not mention what OS you are running and what ISO image you are trying to edit.

A workaround is to try editing the OS through a Virtual Machine running a newer version of Ubuntu.