Steps to reproduce:
- Open any chat room while not logged in or in Incognito Mode.
- Attempt to star a message in the star wall.
- Observe that the "An error occurred performing this action" overlay is shown as the POST request to
http://chat.stackoverflow.com/messages/33607417/starhas failed with 404 Not Found.
Reproduced on Chat.SO and Chat.SE.
Mac OS 10.11.6 (15G1108)
Google Chrome Version 54.0.2840.71 (64-bit)