Module parse failed: Unexpected token (React.js)

Question

I wrote the frontend and backend part in the Mern stack project, but I got such an error during the api integration, how can I solve it?

   ./src/compenents/Post.js 78:25
Module parse failed: Unexpected token (78:25)
You may need an appropriate loader to handle this file type.
|           switch (_context.prev = _context.next) {
|             case 0:
>               if (!(post?._id && answer !== "")) {
|                 _context.next = 5;
|                 break;