Let's break down what's causing your error and fix it step by step:

Why You're Seeing This Error #

The TypeError [INVALID_TYPE] pops up for a few key reasons in your code:

• You're trying to iterate over channels directly via message.guild.channels (in newer Discord.js versions, this is a manager object, not the channel list itself)
• You aren't handling cases where the "Mute" role might not exist (which would pass an invalid ID to the permission overwrite)
• You're using forEach with an asynchronous function, which doesn't wait for permission changes to complete and can lead to unexpected behavior

Fixed Code #

client.on('message', async message => {
  if (message.content.startsWith(prefix + "modrek")) {
    // First, locate the Mute role and handle if it's missing
    const muteRole = message.guild.roles.cache.find(role => role.name === "Mute");
    if (!muteRole) {
      return message.reply("Couldn't find a role named 'Mute'! Please create it first.");
    }

    // Filter to only target text channels (since we're modifying message permissions)
    const textChannels = message.guild.channels.cache.filter(ch => ch.type === "text");

    // Use Promise.all to wait for all permission updates to finish
    await Promise.all(textChannels.map(async channel => {
      await channel.overwritePermissions([
        {
          id: muteRole.id,
          deny: ['SEND_MESSAGES'],
        },
      ], 'Locked channel for Mute role enforcement');
    }));

    message.reply("Successfully locked all text channels for the Mute role!");
  }
});

Key Improvements Made #

• Role existence check: Prevents crashes if the "Mute" role doesn't exist, and gives a clear error message.
• Proper channel iteration: Uses channels.cache to access the actual list of channels (required in modern Discord.js versions).
• Async safety: Promise.all + map ensures the bot waits for every channel's permission change to complete before sending a success notification.
• Targeted channel filtering: Focuses only on text channels, since SEND_MESSAGES permissions don't apply to voice or category channels.

Quick Note for Discord.js v13+ #

If you're using v13 or later, the channel type string is GUILD_TEXT instead of text—just update that filter line to match:

const textChannels = message.guild.channels.cache.filter(ch => ch.type === "GUILD_TEXT");

Also, make sure your bot has the Manage Channels permission enabled in the server, otherwise it won't be able to modify channel permissions.

内容的提问来源于stack exchange，提问作者Medraj