[BUG] Program immediately exits with a traceback if a game and a command is supplied

[zorael]

Describe the bug
When I try to use the program by specifying a game name (or AppID) and a command, it just exits with an error.

Aurora Linux 44 daily (Universal Blue, Fedora image-based/"immutable"), x86_64. Steam is installed as a flatpak.

Environment Information (required):

• Prefixer Version: v1.4.1-Turing (via pipx but it behaves the same in an Arch distrobox)
• Proton Version: (not sure if applicable)
• Linux Distro/Desktop: KDE 6.7.1, Wayland
• Game Name & ID: Guild Wars 2 (1284210)

To Reproduce

1. prefixer 'guild wars 2' info
2. Program exits with a traceback

prefixer.log

Expected behavior
Something other than an immediate program halt.

[wojtmic]

Flatpak Steam isn't currently supported, its planned in an update