---
"@context": https://schema.org
"@type": TechArticle
"@id": https://www.twilio.com/docs/api/errors/80505#article
headline: "80505: Flex Configuration Error"
url: https://www.twilio.com/docs/api/errors/80505
inLanguage: en
dateModified: 2026-06-08T12:04:59.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# 80505: Flex Configuration Error

Log Level: ERROR

## Description

This error occurs when a Flex component is not configured correctly. In Flex, you manage configuration through the Flex Configuration REST API for Twilio-hosted deployments, or through `appConfig.js` and the Flex Configuration REST API for customer-hosted deployments. Flex component behavior can also be customized with `componentProps` and the React `defaultProps` API.

### Possible causes

* A Flex component was given invalid or incomplete configuration values through `componentProps`.
* A plugin changed component defaults through the React `defaultProps` API in a way that does not match the component you are customizing.
* A custom component added with the Flex UI content API is missing a required `key`.
* A customization directly reused an internal Flex UI component in an unsupported way, which can lead to undesired behavior.
* A Flex plugin or Flex UI customization introduced the error. Flex UI issues can come from custom plugins, third-party packages, or Flex UI itself.

### Possible solutions

* Review the Flex configuration in the correct location for your deployment. Use the Flex Configuration REST API for Twilio-hosted Flex. Use `appConfig.js` or the Flex Configuration REST API for customer-hosted Flex.
* Check the component name and every configured property in `componentProps` and `defaultProps` to make sure they match the Flex component you intend to customize.
* Add a unique `key` to every component you add or replace with the Flex UI content API.
* Avoid importing and reusing built-in Flex UI components directly. Customize supported components through the documented Flex UI extension points instead.
* If you cannot identify the misconfiguration from the UI alone, open the Status Report or download an error report so you can review logs and share the details with your administrator or support.

#### Additional resources

* [Flex Configuration](/docs/flex/developer/config)
* [Work with Components and Props](/docs/flex/developer/ui/work-with-components-and-props)
* [User Guide to Troubleshooting the Flex UI](/docs/flex/end-user-guide/troubleshooting)