stdClass Object
(
    [Timestamp] => 2025-06-15T14:16:02Z
    [Ack] => Failure
    [CorrelationID] => d635f813993e3
    [Errors] => stdClass Object
        (
            [ShortMessage] => Line items missing.
            [LongMessage] => Line items missing; line items are required when you specify a callback URL for flat rate shipping options.
            [ErrorCode] => 11827
            [SeverityCode] => Error
        )

    [Version] => 121
    [Build] => 58955130
)