Media Library - No items

Here are the contents of my configuration.yml:

# Configure a default setup of Home Assistant (frontend, api, etc)
default_config:

# Text to speech
tts:
  - platform: google_translate

group: !include groups.yaml
automation: !include automations.yaml
script: !include scripts.yaml
scene: !include scenes.yaml

homeassistant:
  media_dirs:
    media: /media

After having added the last portion to the configuration:

homeassistant:
  media_dirs:
    media: /media

The info message pointing me to the media folder documentation has vanished after having restarted the server. All that’s left is the text: No items. Despite having a /media with a single file clubbed-to-death.mp3 (copied over scp and confirmed the contents using ssh).

Why is the audio file not getting picked up?