Error application anchor

Hello,
I am trying to apply anchor on a dataset with 290 numerical features. Following your test example I wrote the code below. But I get an error. Could you have a look.
class_names = [0, 1]
classifier_name = "svc"
classifier_var = {"probability": True}
train, test, labels_train, labels_test = sklearn.model_selection.train_test_split(feature_vector, target_vector,
                                                                                  train_size=0.80)

classifier = src.classifiers.possible_classifiers[classifier_name](**classifier_var)
classifier.fit(train, labels_train)
print(sklearn.metrics.accuracy_score(labels_test, classifier.predict(test)))
>>> 0.825892857143

explainer = anchor_tabular.AnchorTabularExplainer(class_names, feature_names, train)
explainer.fit(train, labels_train, test, labels_test)
exp = explainer.explain_instance(test[67], classifier.predict, threshold=0.95)
>>>
C:\Users\adhikaria\PycharmProjects\SDQ\venv\lib\site-packages\anchor\anchor_base.py:58: RuntimeWarning: divide by zero encountered in log
  temp = np.log(k * n_features * (t ** alpha) / delta)
C:\Users\adhikaria\PycharmProjects\SDQ\venv\lib\site-packages\anchor\anchor_base.py:59: RuntimeWarning: invalid value encountered in log
  return temp + np.log(temp)
Traceback (most recent call last):
  File "C:/Users/adhikaria/Documents/curium/src/lime_application.py", line 142, in <module>
    exp = explainer.explain_instance(test[67], classifier.predict, threshold=0.95)
  File "C:\Users\adhikaria\PycharmProjects\SDQ\venv\lib\site-packages\anchor\anchor_tabular.py", line 281, in explain_instance
    **kwargs)
  File "C:\Users\adhikaria\PycharmProjects\SDQ\venv\lib\site-packages\anchor\anchor_base.py", line 381, in anchor_beam
    1, verbose=verbose)
  File "C:\Users\adhikaria\PycharmProjects\SDQ\venv\lib\site-packages\anchor\anchor_base.py", line 92, in lucb
    ut, lt = update_bounds(t)
  File "C:\Users\adhikaria\PycharmProjects\SDQ\venv\lib\site-packages\anchor\anchor_base.py", line 89, in update_bounds
    ut = not_J[np.argmax(ub[not_J])]
  File "C:\Users\adhikaria\PycharmProjects\SDQ\venv\lib\site-packages\numpy\core\fromnumeric.py", line 1004, in argmax
    return _wrapfunc(a, 'argmax', axis=axis, out=out)
  File "C:\Users\adhikaria\PycharmProjects\SDQ\venv\lib\site-packages\numpy\core\fromnumeric.py", line 52, in _wrapfunc
    return getattr(obj, method)(*args, **kwds)
ValueError: attempt to get argmax of an empty sequence
marcotcr / anchor

Error application anchor #8
