OneShot crashes at the computer in the gate near the glen

**MILD SPOILER WARNING**, "Problem Description" below spoils a surprise

# Game information

https://store.steampowered.com/app/420530/OneShot/

# Distribution name and version where applicable

```sh
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=22.04
DISTRIB_CODENAME=jammy
DISTRIB_DESCRIPTION="Ubuntu 22.04.3 LTS"
```

# Flatpak info

```
Flatpak 1.12.7
default
host
```

# Problem description

OneShot crashes when you try to open the computer in the Glen region near The Gate

```
Setting wallpaper to /Wallpaper/desktop.png

(oneshot:4403): GLib-GIO-ERROR **: 21:28:40.820: Settings schema 'org.mate.background' is not installed
Uploaded AppInterfaceStats to Steam
```

# Does this issue reproduce with native Steam

Have not tested.

However, I'm virtually certain it would *not* reproduce, based on this:

```bash
gsettings get org.mate.background picture-filename
# Exit code: 0
# Output: '/usr/share/backgrounds/ubuntu-mate-jammy/Jammy-Jellyfish_WP_4096x2304_Grey.png'

flatpak run --command=gsettings com.valvesoftware.Steam get org.mate.background picture-filename
# Exit code: 1
# Output: No such schema “org.mate.background”
```