Fix channels

openslides/utils/autoupdate.py

@@ -24,6 +24,7 @@ def ws_add_site(message):
     message.channel_session['user_id'] = message.user.id
     # Saves the reply channel to the user. Uses 0 for anonymous users.
     websocket_user_cache.add(message.user.id or 0, message.reply_channel.name)
+    message.reply_channel.send({"accept": True})
 
 
 @channel_session_user

requirements_production.txt

@@ -1,5 +1,5 @@
 # Requirements for OpenSlides in production in alphabetical order
-channels>=0.17,<1.1
+channels>=1.0,<1.1
 Django>=1.10.4,<1.11
 djangorestframework>=3.4,<3.5
 jsonfield>=1.0,<1.1