Portal Builder: Cannot Create or Duplicate Experiences

Backend createPlayElement validation fails with BR_LobbyPlayerCountToSpeedUpTimer is required but not present.

POST createPlayElement

HTTP Status:

200 OK

gRPC Message:

INVALID_ARGUMENT

Validation failed for remix

BR_LobbyPlayerCountToSpeedUpTimer

is required but not present

The validation error is returned directly by the backend during the createPlayElement request.

The issue is reproducible when:

• creating a new experience

• importing an existing template

• duplicating another user's editable experience

This confirms the validation failure originates from the backend validation service rather than the client-side Portal Builder.