@globcoco Are you using a version of Ubuntu older than 18.10? Check if the ppa:alexlarsson/flatpak is already in your software list. You can do this by going into the Ubuntu Software Center and then going into preferences and then going into "Software Sources." I think. I haven't used Ubuntu in over a year now. If not add it using the add-apt-repository command

Alternatively, you could also try directly searching for Minder in the Ubuntu Software Center and seeing if a Flatpak installation is already there. I've tried this with other software and it has worked.

Also, I think we should take this to DMs since it's technical help and would show up publicly in this Mastodon instance lol