CORS error while accessing S3 bucket.

This incident type relates to encountering a Cross-Origin Resource Sharing (CORS) error while trying to access an S3 object from a bucket. In order to troubleshoot this issue, it is necessary to ensure that the CORS configuration is properly set on the bucket and that the request headers match the allowed origin, method, and headers specified in the configuration. The recommended steps include verifying the presence of the Origin header, capturing the complete request and response, and checking that the method and headers in the request align with the allowed values in the CORS rule.