Linux pop-os 5.4.0-7634-generic #38~1595345317~20.04~a8480ad-Ubuntu
I encountered error as described in title on reinstallation from apt (I removed deb, and wanted to try out flatpack and snap versions of app. Don't bother to do it, apt/deb version integration is by far the best.).
Also I couldn't be sure if it affects reinstalls only or Ubuntu 20.04 installs in general.
As it turns out piece of postinst script fails. I managed to narrow down piece of script that failed: