If a user somehow is looking at an old version of the page and attempts
to like a post they already like. Display a more reasonable error message.
Previously we would display:
> You are not permitted to view the requested resource.
New error message is:
> Oops! You already performed this action. Can you try refreshing the page?
Triggering this error condition is very tricky, you need to stop the
message bus. A possible reason for it could be bad network connectivity.