MongooseServerSelectionError: connect ECONNREFUSED ::1:27017 不会被修复

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MongooseServerSelectionError: connect ECONNREFUSED ::1:27017 不会被修复

我已经尝试了超过2个小时，试图弄清楚这个数据库出了什么问题。我尝试了一切办法，从重新安装服务器，重启进程，重启等等。在尝试连接时，它一直给我这个错误：

const serverSelectionError = new ServerSelectionError();
                               ^
MongooseServerSelectionError: connect ECONNREFUSED ::1:27017
    at NativeConnection.Connection.openUri (D:\TheShed\MX_\node_modules\mongoose\lib\connection.js:797:32)
    at D:\TheShed\MX_\node_modules\mongoose\lib\index.js:330:10
    at D:\TheShed\MX_\node_modules\mongoose\lib\helpers\promiseOrCallback.js:32:5
    at new Promise ()
    at promiseOrCallback (D:\TheShed\MX_\node_modules\mongoose\lib\helpers\promiseOrCallback.js:31:10)
    at Mongoose._promiseOrCallback (D:\TheShed\MX_\node_modules\mongoose\lib\index.js:1151:10)
    at Mongoose.connect (D:\TheShed\MX_\node_modules\mongoose\lib\index.js:329:20)
    at module.exports (D:\TheShed\MX_\other\DB\mong.js:4:20)
    at D:\TheShed\MX_\app.js:195:37
    at Object. (D:\TheShed\MX_\app.js:197:3) {
  reason: TopologyDescription {
    type: 'Unknown',
    servers: Map(1) {
      'localhost:27017' => ServerDescription {
        _hostAddress: HostAddress { isIPv6: false, host: 'localhost', port: 27017 },
        address: 'localhost:27017',
        type: 'Unknown',
        hosts: [],
        passives: [],
        arbiters: [],
        tags: {},
        minWireVersion: 0,
        maxWireVersion: 0,
        roundTripTime: -1,
        lastUpdateTime: 1421094,
        lastWriteDate: 0,
        error: MongoNetworkError: connect ECONNREFUSED ::1:27017
            at connectionFailureError (D:\TheShed\MX_\node_modules\mongodb\lib\cmap\connect.js:293:20)
            at Socket. (D:\TheShed\MX_\node_modules\mongodb\lib\cmap\connect.js:267:22)
            at Object.onceWrapper (node:events:510:26)
            at Socket.emit (node:events:390:28)
            at emitErrorNT (node:internal/streams/destroy:164:8)
            at emitErrorCloseNT (node:internal/streams/destroy:129:3)
            at processTicksAndRejections (node:internal/process/task_queues:83:21)
      }
    },
    stale: false,
    compatible: true,
    heartbeatFrequencyMS: 10000,
    localThresholdMS: 15,
    logicalSessionTimeoutMinutes: undefined
  }
}

无论我做什么，这个错误都无法解决。MongoDB服务器正在运行，我通过>show dbs来检查，它们都显示正常。而且，C:/data/db也存在且正常。

我该怎么办？

这是我的连接代码：

(async () => {
    await require('./other/DB/mong')();
    console.log("已连接到数据库。");
})();

这是 ./other/DB/mong 的代码：

var mongoose = require("mongoose");
module.exports = async () => {
    await mongoose.connect('mongodb://localhost:27017/MX', {
        keepAlive: true,
        useNewUrlParser: true,
        useUnifiedTopology: true
    });
    return mongoose;
}

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