Earlier my backend project was running on using the command npm run dev but now it is not working.It shows issues like this ::

Please guide on how to fix this as I have to submit the project as a college report.

> ai-project@1.0.0 dev
> npx nodemon server.js

[nodemon] 3.1.11
[nodemon] to restart at any time, enter `rs`
[nodemon] watching path(s): *.*
[nodemon] watching extensions: js,mjs,cjs,json
[nodemon] starting `node server.js`
◇ injected env (2) from .env // tip: ⌘ enable debugging { debug: true }
Server is running on port 3000
Error: querySrv ECONNREFUSED _mongodb._tcp.interview-ai-cluster.sjx4gvt.mongodb.net
    at QueryReqWrap.onresolve [as oncomplete] (node:internal/dns/promises:294:17) {
  errno: undefined,
  code: 'ECONNREFUSED',
  syscall: 'querySrv',
  hostname: '_mongodb._tcp.interview-ai-cluster.sjx4gvt.mongodb.net'
}