몽고 db- connection timed out 에러

몽고 db 에러가 뜨는데 어디가 문제인지 모르겠어요..

Server Listening on 5000

[0] MongooseError [MongooseServerSelectionError]: connection timed out

[0]     at new MongooseServerSelectionError (C:\Users\vkdnj\Desktop\Infrun\boilerplate-mern-stack-master\node_modules\mongoose\lib\error\serverSelection.js:22:11)

[0]     at NativeConnection.Connection.openUri (C:\Users\vkdnj\Desktop\Infrun\boilerplate-mern-stack-master\node_modules\mongoose\lib\connection.js:823:32)

[0]     at Mongoose.connect (C:\Users\vkdnj\Desktop\Infrun\boilerplate-mern-stack-master\node_modules\mongoose\lib\index.js:333:15)

[0]     at Object.<anonymous> (C:\Users\vkdnj\Desktop\Infrun\boilerplate-mern-stack-master\server\index.js:19:26)

[0]     at Module._compile (internal/modules/cjs/loader.js:1137:30)

[0]     at Object.Module._extensions..js (internal/modules/cjs/loader.js:1157:10)

[0]     at Module.load (internal/modules/cjs/loader.js:985:32)

[0]     at Function.Module._load (internal/modules/cjs/loader.js:878:14)

[0]     at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:71:12)

[0]     at internal/main/run_main_module.js:17:47 {

[0]   reason: TopologyDescription {

[0]     type: 'ReplicaSetNoPrimary',

[0]     setName: null,

[0]     maxSetVersion: null,

[0]     maxElectionId: null,

[0]     servers: Map {

[0]       'cluster0-shard-00-01.nvmvj.mongodb.net:27017' => [ServerDescription],

[0]       'cluster0-shard-00-02.nvmvj.mongodb.net:27017' => [ServerDescription],

[0]       'cluster0-shard-00-00.nvmvj.mongodb.net:27017' => [ServerDescription]

[0]     },

[0]     stale: false,

[0]     compatible: true,

[0]     compatibilityError: null,

[0]     logicalSessionTimeoutMinutes: null,

[0]     heartbeatFrequencyMS: 10000,

[0]     localThresholdMS: 15,

[0]     commonWireVersion: null

[0]   },

[0]   [Symbol(mongoErrorContextSymbol)]: {}

[0] }