---
"@context": https://schema.org
"@type": TechArticle
"@id": https://www.twilio.com/docs/api/errors/45777#article
headline: "45777: Address Configuration not found for deployment key."
url: https://www.twilio.com/docs/api/errors/45777
inLanguage: en
dateModified: 2026-06-08T11:29:20.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# 45777: Address Configuration not found for deployment key.

Log Type: APPLICATION

Log Level: WARNING

## Description

This warning appears when your Flex Webchat deployment key does not have a chat address configuration linked to it. To use Webchat 3.x.x, create a deployment key, connect that deployment key to a messaging address, and then use the embed code generated for that deployment key on your website.

### Possible causes

* You created a deployment key but did not complete the step to connect it to a chat address in Flex > Channel management > Messaging.
* Your website is using a deployment key that is not the one linked to the active chat address.
* You replaced your webchat configuration with a new deployment key and chat address, but your website is still using the older deployment key. Twilio does not let you change the deployment key SID or address configuration SID on an existing mapping.

### Possible solutions

* In Console, go to Flex > Channel management > Messaging and create a Chat address with Conversations as the address implementation. Select the correct deployment key SID when you create the address, then save the configuration.
* In Flex > Channel management > Webchat, open the deployment key you want to use and copy the current embed code to your website so the site uses the deployment key that is linked to your chat address.
* If you need to move to a different deployment key, create a new deployment key and a new chat address, then replace the existing embed code on your website. Twilio does not let you update the deployment key SID or address configuration SID for an existing mapping.

#### Additional resources

* [Set up and use Webchat 3.x.x](/docs/flex/developer/conversations/webchat/setup)
* [Webchat 3.x.x overview](/docs/flex/developer/conversations/webchat)
* [Webchat 3.x.x security](/docs/flex/developer/conversations/webchat/security)