Script exit with exit code 255

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[30725] Failed to execute script main
Warning : `load_model` does not return WordVectorModel or SupervisedModel any more, but a `FastText` object which is very similar.
Traceback (most recent call last):
  File "main.py", line 321, in <module>
  File "threads_clusters.py", line 152, in dbscan
  File "sklearn/feature_extraction/text.py", line 1652, in fit_transform
  File "sklearn/feature_extraction/text.py", line 1058, in fit_transform
  File "sklearn/feature_extraction/text.py", line 989, in _count_vocab
ValueError: empty vocabulary; perhaps the documents only contain stop words