I have faced the same problem, not sure what's causing this.
** Attachment added: "15574902383857410942388402630861.jpg"
https://bugs.launchpad.net/ubuntu/+source/sgml-base/+bug/1823272/+attachment/5262922/+files/15574902383857410942388402630861.jpg
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I've encountered the same problem. I received message for 'sgml-base'
and 'linux-image-5.0.0-13-generic':
""Could not install 'sgml-base'
The upgrade will continue but the 'sgml-base' package may not be in a working
state. Please consider submitting a bug report about it.
triggers looping,
Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: sgml-base (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/1823272
Title: