The upload_audio.0 failed to upload.
The field is called upload_audio, the form is called upload_form, and i'm calling it into the template using:
{{ form:upload_form }}
{{ if success }}
{{ success }}
{{ else }}
{{ if errors }}
<div class="bg-red-300 text-white p-2">
{{ errors }}
{{ value }}<br>
{{ /errors }}
</div>
{{ /if }}
{{ fields }}
<div class="p-2">
<label>{{ display }}</label>
<div class="p-1 border-solid border-rounded-sm border-1 border-gray-600">{{ field }}</div>
{{ if error }}
<p class="text-gray-500">{{ error }}</p>
{{ /if }}
</div>
{{ /fields }}
<button type="submit">Submit</button>
{{ /if }}
{{ /form:upload_form }}