Yes, there is documentation related to user-facing errors and redirects to the error page in Ory Kratos. The relevant information can be found in the following sources: 1. [User-facing errors](https://www.ory.sh/docs/kratos/self-service/flows/user-facing-errors) documentation provides details on how Ory Kratos handles errors that need to be displayed to users. 2. [Ory Identities API - frontend](https://www.ory.sh/docs/kratos/reference/api) includes an endpoint for getting user-flow errors. According to the documentation, when a user-facing error occurs during a self-service flow (like login), Ory Kratos will: 1. Store the error message and context. 2. Redirect the user's browser to the Error UI URL specified in the configuration. The Error UI URL is set using the

selfservice.flows.error.ui_url

configuration or the

SELFSERVICE_FLOWS_ERROR_UI_URL

environment variable. The error information can be retrieved using the

/self-service/errors

endpoint, which returns the error associated with a user-facing self-service error. This endpoint also supports stub values to help implement the error UI, such as

?id=stub:500

for a stub 500 (Internal Server Error) error. The error response includes details such as the error code, message, reason, and other relevant information. While this isn't exactly the same as the UI error code documentation, it provides a similar structure for handling and displaying errors to users in your application. For implementing error handling in a single-page app or native app, you can refer to the example error handling logic in the React.js reference implementation provided by Ory: [Ory Kratos React NextJS UI - Error Handling](https://github.com/ory/kratos-react-nextjs-ui/blob/master/pkg/errors.tsx) This implementation shows how to handle various error scenarios, including redirects and error messages, in a frontend application integrated with Ory Kratos.

Yes, there is information available about OAuth 2.0 error responses, including errors like

invalid_client

. While the knowledge sources don't provide an exhaustive list of all possible errors, they do offer some insights into error handling in Ory Hydra. The error you're encountering,

invalid_client

, is a standard OAuth 2.0 error response. This specific error indicates that client authentication failed, which could be due to an unknown client, missing client authentication, or an unsupported authentication method. Ory Hydra follows the OAuth 2.0 specification for error responses. While we don't have a comprehensive list of all possible errors in the provided knowledge sources, we can see that Ory Hydra's API documentation includes information about error responses. For example, in the [Hydra API Reference](https://www.ory.sh/docs/hydra/reference/api), we can see that error responses typically include the following fields: - `error`: A string describing the error type (e.g., "invalid_client") - `error_description`: A human-readable explanation of the error - `error_hint`: Additional information to help identify the error cause - `status_code`: The HTTP status code associated with the error It's worth noting that these error responses are consistent across various endpoints in the Hydra API. If you're looking for a more comprehensive list of OAuth 2.0 error codes, you might want to refer to the official OAuth 2.0 specification, as Ory Hydra implements these standard error codes. However, this information is not present in the provided knowledge sources. For troubleshooting specific errors, the [Hydra Troubleshooting guide](https://www.ory.sh/docs/hydra/self-hosted/gitlab#troubleshooting) provides some examples of common errors and their causes, which might be helpful in diagnosing issues with your OAuth requests. If you need more detailed information about specific error codes or their meanings, you may want to consult the Ory documentation directly or reach out to their support channels, as the provided knowledge sources don't contain an exhaustive list of all possible error codes.

I apologize for the confusion in my previous response. You're right to point out that the information I provided earlier was not accurate for your specific situation. Let's address your concerns based on the information available in the knowledge sources. You're correct that the error codes you've mentioned, such as

invalid_client

,

browser_location_change_required

, and

session_refresh_required

, are not explicitly listed in a comprehensive manner in the provided documentation. The knowledge sources don't contain a complete list of all possible error codes you could receive. However, I can provide some information about the error codes you've mentioned: 1. `browser_location_change_required`: This error is mentioned in the [Kratos API Reference](https://www.ory.sh/docs/kratos/reference/api). It's described as "Usually sent when an AJAX request indicates that the browser needs to open a specific URL. Most likely used in Social Sign In flows." 2. `session_refresh_required`: This error is also mentioned in the Kratos API documentation. It indicates that "The identity requested to change something that needs a privileged session. Redirect the identity to the login init endpoint with query parameters

?refresh=true&return_to=<the-current-browser-url>

, or initiate a refresh login flow otherwise." 3. `invalid_client`: While this error is not explicitly listed in the provided knowledge sources, it is a standard OAuth 2.0 error code, which Ory Hydra (as an OAuth 2.0 server) would use. You're right to note that the documentation seems incomplete regarding a comprehensive list of error codes. The error codes you found (

invalid_request

,

login_required

,

request_denied

) appear to be only a subset of the possible errors. Given this information, I would recommend the following: 1. For the most up-to-date and comprehensive list of error codes, you might need to consult the latest Ory documentation directly on their website, as the provided knowledge sources might not contain the most recent information. 2. You could reach out to Ory support or community channels for a more complete list of error codes. As mentioned in the [OAuth2 for Mobile Apps and Single Page Apps](https://www.ory.sh/oauth2-for-mobile-app-spa-browser/#open-source-and-other-resources) document, you can ask questions in the [Ory Hydra GitHub Discussions](https://github.com/ory/hydra/discussions) or the [Ory Community Slack](https://www.ory.sh/chat). 3. For OAuth 2.0 specific errors like

invalid_client

, referring to the OAuth 2.0 specification might provide more context, as Ory Hydra implements these standard error codes. I apologize that I cannot provide a complete list of all possible errors based on the given knowledge sources. It appears that a comprehensive error code documentation is not available in the provided information.