make sure csrf token gets set

src/c3nav/site/views.py

@@ -10,6 +10,7 @@ from django.contrib.auth.forms import AuthenticationForm, PasswordChangeForm, Us
 from django.core.serializers.json import DjangoJSONEncoder
 from django.db import transaction
 from django.http import HttpResponse, HttpResponseBadRequest
+from django.middleware import csrf
 from django.shortcuts import redirect, render
 from django.urls import reverse
 from django.utils import timezone
@@ -92,6 +93,8 @@ def map_index(request, mode=None, slug=None, slug2=None, details=None, options=N
         'embed': bool(embed),
     }
 
+    csrf.get_token(request)
+
     announcement = Announcement.get_current()
     if announcement:
         messages.info(request, announcement.text)