Seems to happen more often after a restart, after the first 404s it will eventually start pulling posts properly then at some point the connection will go stale and it'll 404 again. It's pretty consistent for me. About to try it out on the latest pull. Nothing in the logs/dev mode. Just 404s in the console.
Then navigate to http://your_domain_or_ip.com:8081 and do what you need to do. You can also use redis-cli but if you're unfamiliar with Redis, like me, this is the way to go. Just don't delete anything right away. Make a backup first.