---
page_type: error
code: 53407
message: "53407: Media connection failed due to DTLS handshake failure"
level: ERROR
product: Programmable Video
---

## Description

There was a problem while negotiating with the remote DTLS peer. Therefore the Participant will not be able to publish or subscribe to Tracks.

### Possible Causes

- One or both of the DTLS peers have an invalid certificate.
- One or both of the DTLS peers have an outdated version of DTLS.
- One or both of the DTLS peers lost internet connectivity while performing a DTLS handshake.

### Possible Solutions

- Ensure that your certificate is valid.
- Ensure that you have a stable internet connection.
- Ensure that the browser or the Mobile SDK supports newer versions of DTLS.