Error: listen EADDRINUSE: address already in use :::3000

Project name = mud-meeting,
link to the project = https://glitch.com/~mud-meeting

when i wanted to start the bot using npm start or node mybot.js it gave this error

Error: listen EADDRINUSE: address already in use :::3000
at Server.setupListenHandle [as _listen2] (net.js:1270:14)
at listenInCluster (net.js:1318:12)
at Server.listen (net.js:1405:7)
at Function.listen (/rbd/pnpm-volume/d991dce8-9334-4f17-981b-6168f663401b/node_modules/.registry.npmjs.org/express/4.17.1/node_modules/express/lib/application.js:618:24)
at Object. (/app/mybot.js:10:5)
at Module._compile (internal/modules/cjs/loader.js:701:30)
at Object.Module._extensions…js (internal/modules/cjs/loader.js:712:10)
at Module.load (internal/modules/cjs/loader.js:600:32)
at tryModuleLoad (internal/modules/cjs/loader.js:539:12)
at Function.Module._load (internal/modules/cjs/loader.js:531:3)
Emitted ‘error’ event at:
at emitErrorNT (net.js:1297:8)
at process._tickCallback (internal/process/next_tick.js:63:19)
at Function.Module.runMain (internal/modules/cjs/loader.js:757:11)
at startup (internal/bootstrap/node.js:283:19)
at bootstrapNodeJSCore (internal/bootstrap/node.js:622:3)

Any solution to this ?

Did you try to change the port of your express server? from 3000 to another number?

const listener = app.listen(process.env.PORT || 8000, function() {
	console.log('Your app is listening on port ' + listener.address().port);
});

In this case is 8000