problems with mysplev

[plecompt446]

[491]filename=p+"/"+"dataset"+"/"+"essen"+"/"+"CART_model.sav"
[492] model = pickle.load(open(filename, 'rb'))
[493]predictions = model.predict(x)
[494]print("58% accuracy ",predictions)

ModuleNotFoundError: No module named 'sklearn.tree.tree'

I constantly get these kind of errors for mysplev, if I comment this part out I get a similar error for KNN_model.sav and so on. Also where can I find an explanation what this function calculates. It are some kind of predictions but predictions of what? Also can someone explain what the pronunciation posteriory probabality score percentage is and how it is calculated? Please in easy terms as I am not a linguist.