80000: Connection failed

The connection moved to the failed state, a terminal condition from which the SDK does not automatically reconnect. It differs from a temporary disconnection, where the SDK keeps retrying to restore the connection on its own.

What you should do

Start from the error attached to the failed state, which explains why the connection failed. Because the failed state is terminal, the SDK will not reconnect on its own, so once the underlying cause is resolved you need to call connect() to try again.

Why it happens

The connection entered the failed state, usually because of an error the SDK treats as non-recoverable rather than a passing network problem. A fatal authentication error is a common cause. This is distinct from a temporary disconnection, where the SDK keeps retrying by itself.

What you'll see

The error is reported with code 80000. The message is typically Connection failed or disconnected by server, though the failure that caused it carries its own, more specific error.