New error code H33: HTTP/2 Stream Broken

Change effective on 24 September 2025

We added a new error code: H33: HTTP/2 Stream Broken. This error code indicates that the request failed due to a break in the HTTP/2 stream. A misbehaving client or dyno can cause this error. Previously, we returned these types of errors as the more generic H99 - Platform Error.

See the Error Codes article for more info about the new error code.