Payload Format Invalid

The payload format does not match the Payload Format Indicator in the PUBLISH packet. Sent in a CONNACK, PUBACK, PUBREC, or DISCONNECT packet when the payload content does not conform to the declared format.

References

docs.oasis-open.org/mqtt/mqtt/v5.0/os/mqtt-v5.0-os.html

In this namespace

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NoSubscriptionFound NotAuthorized PacketIdentifierInUse PacketIdentifierNotFound PacketTooLarge PayloadFormatInvalid ProtocolError QoSNotSupported QuotaExceeded ReAuthenticate ReceiveMaximumExceeded