Since upgrading to Ubuntu 20.04 (64bit, Mate) I've had trouble with the LibreCAD repo for updates.
There's no Focal version, and that's ok, but "Stable main" does not work.
When I use the command:
sudo add-apt-repository ppa:librecad-dev/librecad-stable
However when researching the subject it seems that updates come from the Ubuntu Universe repo. Also my version of LibreCAD seems up to date at 2.1.3 as of 2021-Apr-3.
About the repository entry Under "Other Software" in the "Software & Updates" app, the Source entry with URI "http://ppa.launchpad.net/librecad/librecad-stable/ubuntu" Distrib: "stable" and Components: "main"; should this entry be removed?
PS: I'm a long time user of AutoCAD 2D, IntelliCAD and others. The LibreCAD I/F is different and for a long time I dismissed it, but recently I found all it's capabilities and its GREAT !!! Thank you !!