Guys - I installed the flatpack / Nuvola apps - and they simply never fire up (have rebooted, run these on my ubuntu server already).
I am sure I am not the only one that pushes Sparky as a killer desktop OS -
https://tutorialforlinux.com/2018/04/16/how-to-install-flatpak-sparkylinux-5-easy-guide/
https://nuvola.tiliado.eu/
:(
Works fine for me. Could you describe step by step your installation process and how do you run nuvola app?