After I've trained model in Create ML, it's work on iOS 12 (both device and simulator). But after I've changed target platform to iOS 11.3 for testing with device with iOS 11.3, it's not working anymore.
The crash log
Fatal error: 'try!' expression unexpectedly raised an error: Error Domain=com.apple.CoreML Code=3 "No known class for loading model type MLModelType_pipelineClassifier" UserInfo={NSLocalizedDescription=No known class for loading model type MLModelType_pipelineClassifier}
Currently, the model that was created from Create ML seems to be working with iOS 12 only.