TypeError: Cannot read property 'roles' of null - command

Question

I tried to create a command of -clear (amount) and the coomand doing well but the permissions dont
this is what the error i get
TypeError: Cannot read property 'roles' of null
at Client.<anonymous> (C:\Users\elyas\OneDrive\שולחן העבודה\discordbot\main.js:448:23)
at Client.emit (events.js:327:22)
at MessageCreateAction.handle (C:\Users\elyas\OneDrive\שולחן העבודה\discordbot\node_modules\discord.js\src\client\actions\MessageCreate.js:31:14)
at Object.module.exports [as MESSAGE_CREATE] (C:\Users\elyas\OneDrive\שולחן העבודה\discordbot\node_modules\discord.js\src\client\websocket\handlers\MESSAGE_CREATE.js:4:32)
at WebSocketManager.handlePacket (C:\Users\elyas\OneDrive\שולחן העבודה\discordbot\node_modules\discord.js\src\client\websocket\WebSocketManager.js:384:31)
at WebSocketShard.onPacket (C:\Users\elyas\OneDrive\שולחן העבודה\discordbot\node_modules\discord.js\src\client\websocket\WebSocketShard.js:444:22)
at WebSocketShard.onMessage (C:\Users\elyas\OneDrive\שולחן העבודה\discordbot\node_modules\discord.js\src\client\websocket\WebSocketShard.js:301:10)
at WebSocket.onMessage (C:\Users\elyas\OneDrive\שולחן העבודה\discordbot\node_modules\ws\lib\event-target.js:132:16)
at WebSocket.emit (events.js:315:20)
at Receiver.receiverOnMessage (C:\Users\elyas\OneDrive\שולחן העבודה\discordbot\node_modules\ws\lib\websocket.js:825:20)
and here the code:
client.on('message', message => {
let args = message.content.substring(PREFIX.length).split(" ");
const deltef = args[1]
const amount = parseInt(args[1]);
if(message.member.roles.cache.has('715841880482512897')) {
if(args[0] == 'clear') {
if (isNaN(amount)) {
message.reply('that doesn\'t seem to be a valid number.');
} else if (amount < 2 || amount > 100) {
message.reply('you need to input a number between 2 and 100.');
}
else if (amount > 2 || amount < 100)
message.channel.bulkDelete(args[1]);
message.channel.send("deleted" + " " + deltef + " " + "messages" + ('✅'))
}
}
}
);
if you can help i will be happy

Answer 1

Are you trying to use this command in DM's? Because according to the Discord.JS documentation message.member is only available in guilds, what means if you try to use it in DM's it will be undefined.
https://discord.js.org/#/docs/main/master/class/Message?scrollTo=member
I recommend limiting commanmd usage only to guilds so things like this can't happen.
client.on('message', message => {
if (message.author.bot || message.channel.type === "dm") return;
// your code...
})