Training fails after extending Rasa Image

This thread Training fails when using HFTransformers contains the solution for the BERT-transformer. I had to add cache_dir: /tmp to the pipeline component.

However after training, I’ve got this error in my production container log :

**********************************************************************
  Resource vader_lexicon not found.
  Please use the NLTK Downloader to obtain the resource:

  >>> import nltk
  >>> nltk.download('vader_lexicon')

  For more information see: https://www.nltk.org/data.html

  Attempted to load sentiment/vader_lexicon.zip/vader_lexicon/vader_lexicon.txt

  Searched in:
    - '/nltk_data'
    - '/opt/venv/nltk_data'
    - '/opt/venv/share/nltk_data'
    - '/opt/venv/lib/nltk_data'
    - '/usr/share/nltk_data'
    - '/usr/local/share/nltk_data'
    - '/usr/lib/nltk_data'
    - '/usr/local/lib/nltk_data'
    - ''
**********************************************************************

Did I install the lexicon incorrectly or in the wrong location?