One-class svm classification error : Classification metrics can't handle a mix of unknown and binary targets

Question

X_train, X_test, y_train, y_test = train_test_split(x, y, test_size=0.3, random_state = 2020, stratify=y)   

X_train_user = X_train[y_train == \'ji2hwh\']
X_train_a