Try replacing the 'Ratio' with 'sampling_strategy' :
from imblearn.over_sampling import SMOTE
sm = SMOTE(random_state=42, sampling_strategy=0.6)
Try replacing the 'Ratio' with 'sampling_strategy' :
from imblearn.over_sampling import SMOTE
sm = SMOTE(random_state=42, sampling_strategy=0.6)