A Multiplayer API error, sent with HTTP 409. Status: the Multiplayer API is in private alpha; this code is part of its published contract.
When
The room has maxPlayers players, or it has seated 4 times maxPlayers members over its life.
What to do
Join another room, or join as a spectator.
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_full",
"detail": "A sentence that is safe to show.",
"next": "Join another room, or join as a spectator.",
"docsUrl": "https://lobbylab.gg/docs/errors/room_full"
}See also: every error code, the API reference and the docs.