---
"@context": https://schema.org
"@type": TechArticle
"@id": https://www.twilio.com/docs/api/errors/13325#article
headline: "13325: Gather->Play: Invalid Content-Type"
url: https://www.twilio.com/docs/api/errors/13325
inLanguage: en
dateModified: 2026-03-11T18:38:39.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# 13325: Gather->Play: Invalid Content-Type

Log Level: ERROR

## Description

Play requires an audio `Content-Type`

### Possible causes

* Play references a URL that does not return audio or is returning an invalid `Content-Type`.

### Possible solutions

* Make certain the URL returns an audio file
* See the [Play Verb](/docs/voice/twiml/play) API Reference for more information on valid `Content-Type`s.