help me

[mihawkman]

i run my bot using repl.it and i got this error then the bot went offline...why?

/home/runner/ThistleLumberingSet/index.js:36
    if (oldState.channel && oldState.channel.members.size === 1 && oldState.channelID === oldState.guild.voice.channelID) {
                                                                                                               ^

TypeError: Cannot read property 'channelID' of undefined
    at Client.<anonymous> (/home/runner/ThistleLumberingSet/index.js:36:112)
    at Client.emit (events.js:315:20)
    at VoiceStateUpdate.handle (/home/runner/ThistleLumberingSet/node_modules/discord.js/src/client/actions/VoiceStateUpdate.js:40:14)
    at Object.module.exports [as VOICE_STATE_UPDATE] (/home/runner/ThistleLumberingSet/node_modules/discord.js/src/client/websocket/handlers/VOICE_STATE_UPDATE.js:4:35)
    at WebSocketManager.handlePacket (/home/runner/ThistleLumberingSet/node_modules/discord.js/src/client/websocket/WebSocketManager.js:384:31)
    at WebSocketShard.onPacket (/home/runner/ThistleLumberingSet/node_modules/discord.js/src/client/websocket/WebSocketShard.js:444:22)
    at WebSocketShard.onMessage (/home/runner/ThistleLumberingSet/node_modules/discord.js/src/client/websocket/WebSocketShard.js:301:10)
    at WebSocket.onMessage (/home/runner/ThistleLumberingSet/node_modules/ws/lib/event-target.js:125:16)
    at WebSocket.emit (events.js:315:20)
    at Receiver.receiverOnMessage (/home/runner/ThistleLumberingSet/node_modules/ws/lib/websocket.js:797:20)
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! [email protected] start: `node index.js`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the [email protected] start script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     /home/runner/.npm/_logs/2020-11-09T14_11_13_396Z-debug.log

[wolf-yuan-6115]

You may need to use oldState.guild.voice.channel.id