A Multiplayer API error, sent with HTTP 400. Status: the Multiplayer API is in private alpha; this code is part of its published contract.
When
The request names a room type this project does not have.
What to do
Use one of the room types in your project's config (GET /v1/config lists them), or add the type first.
The answer
Every error is a JSON body with a stable error code. Clients act on the codes they know and treat any other code as a failure of its HTTP status, and keep fields they do not know.
{
"error": "room_type_unknown",
"detail": "A sentence that is safe to show.",
"next": "Use one of the room types in your project's config (GET /v1/config lists them), or add the type first.",
"docsUrl": "https://lobbylab.gg/docs/errors/room_type_unknown"
}See also: every error code, the API reference and the docs.