"Sidekiq is not running"

This throws up a heap of errors, such as “Sidekiq heartbeat test failed, restarting”

and a lot of stuff like:

“Uncaught TypeError: e.get is not a function Url: http://forum.delimiter.com.au/assets/application-45e607a9054138f8f545cf8d6205b8c3.js Line: 13 Column: 7383 Window Location: http://forum.delimiter.com.”

Shows this page (is a bit clipped in the screenshot: