Step-by-step – GreenWithEnvy Installation in Debian Bullseye

Installing

2. 2. Installing Flatpak

   How to Setup Flatpak on Debian Bullseye

   Flatpak Debian Bullseye Installation Guide

   Flatpak Debian Bullseye Setup

3. 3. Installing GreenWithEnvy

   Then to Install GreenWithEnvy Flatpak App on Debian Bullseye.

   flatpak remote-add --if-not-exists flathub https://flathub.org/repo/flathub.flatpakrepo

   For further Insight see the Flatpak Official Documentation.
   And after:

   flatpak install com.leinardi.gwe

   The Flatpak App Setup do Not need the sudo Command because then it Runs confined into a Sandbox.
   However, you’ll be Prompted to Authenticate with your User’s Admin Pass.
   Then Confirm the proposed Setup with ‘Enter’ and Wait patiently until the App is Downloaded, Built and Installed.