I ran into this rather puzzling message while working on a Next.js/React app:

TypeError: resolver is not a function

Turned out the solution was very simple.

I was doing some editing and I commented out the default export of the component for the API call I was editing:

export default <name>

So, make sure you have a default export and the error will go away.

Lessons in this unit:

0:	Introduction
1:	How to handle errors in React
2:	Fix the “Objects are not valid as a React child” error
3:	Fix Uncaught Error Objects are not valid as a React child
4:	How to use useEffect callback with event callbacks
5:	How to debug a React application
6:	How to fix the dangerouslySetInnerHTML did not match error in React
7:	▶︎ React, how to fix the TypeError: resolver is not a function error
8:	How to fix the "cannot update a component while rendering a different component" error in React
9:	Testing React components
10:	How to configure HTTPS in a React app on localhost