Optional
errorThis shall be a human-readable string that provides details about the error condition. As an example, if the ErrorStateID indicates that the device is a Robotic Vacuum that is stuck, the ErrorStateDetails contains "left wheel blocked".
This shall be populated with a value from the ErrorStateEnum.
Optional
errorThis field shall be present if the ErrorStateID is from the set reserved for Manufacturer Specific Errors, otherwise it shall NOT be present. If present, this shall contain a human-readable description of the ErrorStateID; e.g. for a manufacturer specific ErrorStateID of "0x80" the ErrorStateLabel may contain "My special error".
See
MatterSpecification.v13.Cluster § 1.14.4.4