I'm new to discord.js and I have no clue why I'm getting this error:

Uncaught Error [TOKEN_INVALID]: An invalid token was provided.

my bot.js file

    const { Client, Intents } = require('discord.js');
    const client = new Client({ intents: [Intents.FLAGS.GUILDS, Intents.FLAGS.GUILD_MESSAGES] });
    
    client.on('ready', () => {
        console.log(`Successfully Logged in as ${client.user.tag}!`);
    });
    
    client.login(process.env.TOKEN);

.env file

TOKEN='my Bot token here'

I'm 100% sure that my bot token is correct/valid, I have also tried revoking it and copy-pasting the new token several times, but I still get the same error... I have searched up nearly everywhere on the net and I still haven't found a solution to my problem.

package.json file

{
  "dependencies": {
    "discord.js": "^13.6.0",
    "dotenv": "^16.0.0"
  }
}