Handbrake flatpak build would apparently need some refreshing…
Info: org.gnome.Platform is end-of-life, with reason: The GNOME 3.36 runtime is no longer supported as of February 13, 2021. Please ask your application developer to migrate to a supported platform.
Error: Can’t remove org.gnome.Platform/x86_64/3.36, it is needed for: fr.handbrake.ghb/x86_64/stable