title: LDA visualization [ import_optional_dependency() got an unexpected keyword argument 'errors' ]
body: <p>i got a error message while visualizing LDA model</p>
  <pre><code>import pyLDAvis
  import pyLDAvis.gensim_models
  
  pyLDAvis.enable_notebook()
  
  vis = pyLDAvis.gensim_models.prepare(ldamodel,corpus, dictionary)
  vis
  </code></pre>
  <p>and it gives me error message
  &quot; import_optional_dependency() got an unexpected keyword argument 'errors'&quot;</p>