Unable to get output for this code

const express=require(‘express’)
const server=express()
server.get(’/’,function(req,res,next){
console.log(“yo”)
res.send(“Hello”)
})
server.get(’/greet/:name’,function(req,res,next){
let greeting=“Good Morning”+req.params.name
res.send(greeting)
})
server.listen(2121)

but my window is showing

Cannot GET /greet/vasu

Did you save the file before running ? The code looks ok only