Produits Entr'ouvert » w.c.s.

https://sentry.entrouvert.org/entrouvert/sictiam/issues/54776/

TypeError: 'NoneType' object is not subscriptable
(39 additional frame(s) were not displayed)
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  File "django/template/base.py", line 904, in render_annotated
    return self.render(context)
  File "django/template/defaulttags.py", line 511, in render
    values = {key: val.resolve(context) for key, val in self.extra_context.items()}
  File "django/template/defaulttags.py", line 511, in <dictcomp>
    values = {key: val.resolve(context) for key, val in self.extra_context.items()}
  File "django/template/base.py", line 698, in resolve
    new_obj = func(obj, *arg_vals)
  File "django/template/defaultfilters.py", line 519, in first
    return value[0]