Yes, CockroachDB is supported in Ory Hydra. According to the knowledge sources, Ory Hydra supports CockroachDB as a storage backend. Here are the key points: 1. CockroachDB is listed as one of the supported databases for Ory Hydra, along with PostgreSQL, MySQL, and SQLite. 2. To use CockroachDB with Ory Hydra, you need to configure the Data Source Name (DSN) with the

cockroach://

prefix. For example:

DSN=<cockroach://user:password@host:123/database>

3. Additional DSN parameters are supported for CockroachDB, such as

sslmode

,

application_name

,

sslcert

,

sslkey

, and

sslrootcert

. 4. When using CockroachDB, you need to run database migrations using the

hydra migrate sql

command before starting the Ory Hydra server. 5. CockroachDB Enterprise is specifically mentioned as supported for Ory Hydra Enterprise builds, offering features like multi-region failover, database sharding, and zero-downtime migrations. For more detailed information on configuring CockroachDB with Ory Hydra, you can refer to the [Ory documentation on database setup and configuration](https://www.ory.sh/docs/hydra/self-hosted/dependencies-environment) and [CockroachDB configuration](https://www.ory.sh/docs/self-hosted/deployment#cockroachdb).

Based on the error message you've provided, it appears you're encountering an issue with the Ory Elements UI library, specifically in the selfservice-ui application. This error is related to a circular structure being converted to JSON, which is not directly addressed in the provided knowledge sources. However, I can offer some general guidance based on the information available. 1. First, it's important to note that this error is occurring in the

@ory/elements-markup

package, which is part of the Ory Elements library used for building custom UIs for Ory services. 2. The error suggests that there's a circular reference in an object being passed to a component, likely the

UserErrorCard

component. To troubleshoot this issue, you could try the following steps: 1. Make sure you're using the latest version of the Ory Elements library. You can update it by running:

npm update @ory/elements @ory/elements-markup

2. Check your implementation to ensure you're not passing any circular structures to the Ory Elements components. This might involve reviewing how you're handling and passing error objects or responses from Ory APIs. 3. If you're using a custom domain with Ory Network, ensure that your configuration is correct. As mentioned in the [Ory documentation on troubleshooting](https://www.ory.sh/docs/troubleshooting), there can be issues with routing when using custom domains with certain Ory clients. 4. Consider using the

@ory/client

package instead of

@ory/kratos-client

if you're not already doing so. According to an Ory team member's comment in a GitHub issue,

@ory/kratos-client

can sometimes have issues with Ory Cloud and is expected to be deprecated. If the problem persists after trying these steps, you might want to: 1. Check the [Ory Elements repository](https://github.com/ory/elements/) for any open issues related to this error. 2. Consider opening a new issue in the Ory Elements repository with details about your setup and the steps to reproduce the error. Remember, without more context about your specific implementation and setup, it's challenging to provide a definitive solution. If you need further assistance, you might want to share more details about your project setup and the steps you're following in the tutorial.