Empty Object Returned From `getInitialProps`
Why This Error Occurred​
In one of your page components you added a getInitialProps that returned an empty object. This de-optimizes automatic static optimization. If you meant to do this and understand the consequences you can ignore this message as it is only shown in development.
Possible Ways to Fix It​
Look for any page's using getInitialProps that return an empty object {}. You might also need to update higher order components (HOCs) to only add getInitialProps if they are present on the passed component.