broker_offset_unknown

The broker's UTC offset is not known yet, so UTC times can't be given.

HTTP 503.

Likely cause: No live ticks since the terminal started (weekend, closed market).

What to do: Retry shortly, or omit timeBasis=utc to get broker time.

Retry: Yes. Nothing happened (or it was a read), so repeat it, after Retry-After when present.

Listed under Accounts and terminals in Errors. Send the error’s requestId to support and we can find the request.