Based on the information provided in the extracts, there is no specific mention of validation errors in webhooks returning a 500 error code. The extracts do mention that Ory provides different levels of error handling, including request level errors, method level errors, and field level errors. However, it does not specify the error codes associated with these errors. In terms of customizing the error code, the extracts do not provide any information on whether this is possible with Ory. It's important to note that a 500 error typically indicates an internal server error, which is usually not related to validation errors. For more detailed information on error handling and customization, you may want to refer to the [Ory documentation](
https://www.ory.sh/docs/kratos/bring-your-own-ui/custom-ui-basic-integration#error-handling).