If an error occurred in action file, we always get the message `Action xxx does not exist.` when `require` is done. This will send a 404 http code. But we should get a 503 http code with a real error message.
If an error occurred in action file, we always get the message
Action xxx does not exist.whenrequireis done.This will send a 404 http code.
But we should get a 503 http code with a real error message.