Use a context processor to provide settings (here: ADMINS) to templates.

biscuit/core/settings.py

@@ -42,6 +42,7 @@ INSTALLED_APPS = [
     'django.contrib.messages',
     'django.contrib.staticfiles',
     'django_global_request',
+    'settings_context_processor',
     'sass_processor',
     'easyaudit',
     'bootstrap4',
@@ -95,6 +96,7 @@ TEMPLATES = [
                 'django.template.context_processors.request',
                 'django.contrib.auth.context_processors.auth',
                 'django.contrib.messages.context_processors.messages',
+                'settings_context_processor.context_processors.settings'
             ],
         },
     },
@@ -229,4 +231,6 @@ COLOUR_DARK = _settings.get('theme.colours.dark', '#343a40')
 
 ADMINS = _settings.get('admins', [])
 
+TEMPLATE_VISIBLE_SETTINGS = ['ADMINS']
+
 _settings.populate_obj(sys.modules[__name__])

biscuit/core/templates/error.html

@@ -16,7 +16,7 @@
     {% endblocktrans %}
    </p>
    <ul>
-    {% for admin in admins %}
+    {% for admin in ADMINS %}
      <li>
       {{ admin.0 }}
       &lt;

biscuit/core/views.py

@@ -21,7 +21,6 @@ def error_handler(status: int) -> Callable[..., HttpResponse]:
 
         context['status'] = status
         context['caption'] = _('Page not found')
-        context['admins'] = settings.ADMINS
 
         if status == 404:
             context['message'] = _('This page does not exist. If you were redirected by a link on an external page, it is possible that that link was outdated.')

pyproject.toml

@@ -35,6 +35,7 @@ django-sass-processor = "^0.7.3"
 libsass = "^0.19.2"
 colour = "^0.1.5"
 dynaconf = {version = "^2.0", extras = ["yaml", "toml", "ini"]}
+django-settings-context-processor = "^0.2"
 django-auth-ldap = { version = "^2.0", optional = true }
 
 [tool.poetry.extras]