AXIOS/UNKNOWN
An Axios error occurred, but it did not match any more specific classification rule (timeout, unreachable, HTTP status, etc.).
Classification
Application code. The wire value and spelling remain the same in every language. A registered code does not establish that its feature is active in every deployment.
Handling
Check the transport and connection state. A timeout or broken response does not prove the server made no change. Reconcile state-changing operations before retrying; reconnect only according to the session policy.