Add organizer scope when getting all plugins

src/pretix/base/plugins.py

@@ -29,6 +29,7 @@ from django.apps import AppConfig, apps
 from django.conf import settings
 from django.core.exceptions import ImproperlyConfigured
 from django.utils.translation import gettext_lazy as _
+from django_scopes import scope
 from packaging.requirements import Requirement
 
 PLUGIN_LEVEL_EVENT = 'event'
@@ -71,7 +72,8 @@ def get_all_plugins(*, event=None, organizer=None) -> List[type]:
                         continue
                 elif organizer and hasattr(app, 'is_available'):
                     if not event_fallback_used:
-                        event_fallback = organizer.events.first()
+                        with scope(organizer=organizer):
+                            event_fallback = organizer.events.first()
                         event_fallback_used = True
                     if not event_fallback or not app.is_available(event_fallback):
                         continue