# 63037: Channel Media Upload Error

Log Type: CARRIER

Log Level: WARNING

## Description

Use this warning when Twilio cannot upload media to the channel provider. Twilio retries the upload automatically.

### Possible causes

* The channel provider returned a transient upload failure.
* The `MediaUrl` does not point to a file Twilio can fetch and validate.
* The media file does not meet the channel's supported MIME type or size limits.

### Possible solutions

* Let Twilio retry the upload. If you resend the message, try again after the provider recovers.
* Confirm that the `MediaUrl` returns the expected file and that the `Content-Type` header matches the file contents.
* Keep the media within the channel's size limits and use a supported MIME type for that channel.

#### Additional resources

* [Accepted content types for media](/docs/messaging/guides/accepted-mime-types)
* [Media subresource](/docs/messaging/api/media-resource)