stdClass Object ( [Timestamp] => 2024-02-24T05:15:26Z [Ack] => Failure [CorrelationID] => 7aaeea8676e9c [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] => 58322870 )