Erreur Bot

{
  "date": "Tue Jul 10 2018 02:20:54 GMT+0200 (CEST)",
  "process": {
    "pid": 22693,
    "uid": 1002,
    "gid": 1002,
    "cwd": "/home/nodeapp/mffbot",
    "execPath": "/usr/bin/node",
    "version": "v8.11.3",
    "argv": [
      "/usr/bin/node",
      "/home/nodeapp/mffbot/app.js"
    ],
    "memoryUsage": {
      "rss": 65482752,
      "heapTotal": 29716480,
      "heapUsed": 26214680,
      "external": 1111008
    }
  },
  "os": {
    "loadavg": [
      1.515625,
      1.5546875,
      1.697265625
    ],
    "uptime": 13392782
  },
  "trace": [
    {
      "column": 19,
      "file": "events.js",
      "function": "Client.emit",
      "line": 186,
      "method": "emit",
      "native": false
    },
    {
      "column": 17,
      "file": "/home/nodeapp/mffbot/node_modules/discord.js/src/client/websocket/WebSocketConnection.js",
      "function": "WebSocketConnection.onError",
      "line": 374,
      "method": "onError",
      "native": false
    },
    {
      "column": 16,
      "file": "/home/nodeapp/mffbot/node_modules/ws/lib/event-target.js",
      "function": "WebSocket.onError",
      "line": 128,
      "method": "onError",
      "native": false
    },
    {
      "column": 13,
      "file": "events.js",
      "function": "emitOne",
      "line": 116,
      "method": null,
      "native": false
    },
    {
      "column": 7,
      "file": "events.js",
      "function": "WebSocket.emit",
      "line": 211,
      "method": "emit",
      "native": false
    },
    {
      "column": 14,
      "file": "/home/nodeapp/mffbot/node_modules/ws/lib/websocket.js",
      "function": "_receiver.cleanup",
      "line": 211,
      "method": "cleanup",
      "native": false
    },
    {
      "column": 13,
      "file": "/home/nodeapp/mffbot/node_modules/ws/lib/receiver.js",
      "function": "Receiver.cleanup",
      "line": 557,
      "method": "cleanup",
      "native": false
    },
    {
      "column": 20,
      "file": "/home/nodeapp/mffbot/node_modules/ws/lib/websocket.js",
      "function": "WebSocket.finalize",
      "line": 206,
      "method": "finalize",
      "native": false
    },
    {
      "column": 13,
      "file": "events.js",
      "function": "emitOne",
      "line": 116,
      "method": null,
      "native": false
    },
    {
      "column": 7,
      "file": "events.js",
      "function": "TLSSocket.emit",
      "line": 211,
      "method": "emit",
      "native": false
    }
  ],
  "stack": [
    "Error: Unhandled \"error\" event. ([object Object])",
    "    at Client.emit (events.js:186:19)",
    "    at WebSocketConnection.onError (/home/nodeapp/mffbot/node_modules/discord.js/src/client/websocket/WebSocketConnection.js:374:17)",
    "    at WebSocket.onError (/home/nodeapp/mffbot/node_modules/ws/lib/event-target.js:128:16)",
    "    at emitOne (events.js:116:13)",
    "    at WebSocket.emit (events.js:211:7)",
    "    at _receiver.cleanup (/home/nodeapp/mffbot/node_modules/ws/lib/websocket.js:211:14)",
    "    at Receiver.cleanup (/home/nodeapp/mffbot/node_modules/ws/lib/receiver.js:557:13)",
    "    at WebSocket.finalize (/home/nodeapp/mffbot/node_modules/ws/lib/websocket.js:206:20)",
    "    at emitOne (events.js:116:13)",
    "    at TLSSocket.emit (events.js:211:7)"
  ]
}