MRPC_NOT_CONNECTED

Terminal route error (`/{mt4|mt5}/{id}/…`): the terminal has no broker connection right now.

HTTP 503. Nothing reached the broker.

Likely causes:

• The terminal is starting or reconnecting.
• The broker server is down or rejected the login.

What to do: Retry with backoff and check the account’s health endpoint.

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

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