ValueError: Data l2-norm must be 1, found 0.0

[peterphancong]

Thank you for your great source code.
While I using soft von_mises_fisher_mixture, I got this error. The error only happen with 1000 short documents, it run well with small amount. Below is the full error log.

Could you please show me how to fix it? Thank you so much

File "mvmf_document_clustering.py", line 65, in <module>
    vmf_soft.fit(X)
  File "C:\Users\phuocphan\miniconda3\envs\Py36\lib\site-packages\spherecluster\von_mises_fisher_mixture.py", line 826, in fit
    X = self._check_fit_data(X)
  File "C:\Users\phuocphan\miniconda3\envs\Py36\lib\site-packages\spherecluster\von_mises_fisher_mixture.py", line 789, in _check_fit_data
    raise ValueError("Data l2-norm must be 1, found {}".format(n))
ValueError: Data l2-norm must be 1, found 0.0