[Bug] TypeError when picking up `KNeighborsClassifier`

[1chooo]

We always encounter the following message when we select the KNeighborsClassifier algorithm. Although it doesn't affect usability, we can investigate it further!

  File "/Users/linchunho/Developer/simple-ai/Refinaid/Utils/Update.py", line 336, in update_training_results
    figures, evaluations = training(dataset_config, model_config)
TypeError: cannot unpack non-iterable NoneType object

UserWarning: X does not have valid feature names, but KNeighborsClassifier was fitted with feature names