Error in evaluate command

[Hezal12345]

eval.evaluate(stream=stream, model=cfiers, model_names=['HT', 'HAT']);

when i run above command in google colab, I get error below:
rest all commands runs successfuly, only error in evaluate.

ValueError Traceback (most recent call last)
in <cell line: 1>()
----> 1 eval.evaluate(stream=stream, model=cfiers, model_names=['HT', 'HAT']);

1 frames
/usr/local/lib/python3.10/dist-packages/skmultiflow/evaluation/base_evaluator.py in _init_evaluation(self, stream, model, model_names)
159 if isinstance(model_names, list):
160 if len(model_names) != self.n_models:
--> 161 raise ValueError("Number of model names does not match the number of models.")
162 else:
163 self.model_names = model_names

ValueError: Number of model names does not match the number of models.