This is the default "500: Server Error" page. User agents that don't "Accept" HTML will see a JSON version instead.
You can customize the control logic for your needs in
config/500.js Sails considers a request in a "500: Server Error" state when your app throws a catchable error (not inside of an asynchronous callback).
You can also trigger this response from one of your controllers or policies with:
return res.serverError( e ); (where
e is an optional message, error, or array of errors to include in the response).