I have recently upgraded from Ubuntu 18.04 to 20.04
My OpenLP installation was working perfectly on 18.04, but has now disappeared and I cannot reinstall it.
There seems to be a conflict with LibreOffice (I have version 7.2).
It signals a dependency from python3-uno which cannot be resolved, and exploring further for python3-uno, a conlict with libreoffice-commun. Looking things with Ubuntu packages manager, I see an openp uninstalled packege, but selecting it for installation indicates it will have to remove libreoffice then install a number of other packages.
On the other hand, the repositary indicated (ppa:openlp-core/release) does not seem to find a focal release.
Already in 2016, I found notes saying that I had had to uninstall LibreOffice to install OpenLP then reinstall LibreOffice.
I hope I can get some help to solve the issue!