This is fine (Apache Web Server)

Used as a catch-all error condition for allowing response bodies to flow through Apache when ProxyErrorOverride is enabled.[dubious ] When ProxyErrorOverride is enabled in Apache, response bodies that contain a status code of 4xx or 5xx are automatically discarded by Apache in favor of a generic response or a custom response specified by the ErrorDocument directive.[69] The phrase 'This is fine' is an Internet meme referring to ignoring the situation or taking no action despite obvious evidence of an ongoing catastrophe.