A Multiplayer API error, sent with HTTP 403. Status: the Multiplayer API is in private alpha; this code is part of its published contract.
When
The room was created for chosen players only, and this player is not one of them.
What to do
Join another room, or ask the game's backend to reserve a seat for this player.
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": "not_reserved",
"detail": "A sentence that is safe to show.",
"next": "Join another room, or ask the game's backend to reserve a seat for this player.",
"docsUrl": "https://lobbylab.gg/docs/errors/not_reserved"
}See also: every error code, the API reference and the docs.