.. _faq: FAQ - Frequently Asked Questions ================================ Here we try to answer some common questions and pitfalls about FlaskBB. * Why do I get a ``AttributeError: 'NullTranslations' object has no attribute 'add'`` exception? This usually happens when you forgot to compile the translations. To compile them, just run:: $ flaskbb translations compile Relevant issue: `#389 <https://github.com/sh4nks/flaskbb/issues/389>`_ * Why isn't the cache (Flask-Caching) using the configured ``REDIS_URL``? You have to set the ``CACHE_REDIS_HOST`` to the ``REDIS_URL``. This is inconvenience is caused because you are not limited to redis as the caching backend. See the `Flask-Caching <https://pythonhosted.org/Flask-Caching/#configuring-flask-caching>`_ documentation for a full list of caching backends. Relevant issue: `#372 <https://github.com/sh4nks/flaskbb/issues/372>`_