Add missing tag decorator

manager/templatetags/manager.py

@@ -10,6 +10,7 @@ def orgaObjects(cls, orga):
 def directUserOrgas(user):
     return sorted(user.organization_set.all(), key=lambda x: str(x))
 
+@register.simple_tag
 def directOrgaString(user):
     return ", ".join(str(orga) for orga in directUserOrgas(user))