I used nodemon to run server.js but an error occurred

enter image description here

const express=require('express');
const cors=require('cors');
const app=express();
app.use(cors());
app.all('/json-server',(request,response)=>{
    response.setHeader('Access-Control-Allow-Origin','*');
    response.setHeader('Access-Control-Allow-Headers','*');
    response.send('hello ajax');
});
app.listen(8000,function(){
    console.log("The service has been started and port 8000 is listening.");
});

I tried to check the node installation path and global variables, and also searched for answers in other forums, but I couldn’t find a solution.