Your guild ID or client ID are incorrect, or you have not connected your bot to your server before running it.
Double check your guild and client IDs in your token.json file that they are correct and are strings. Also, check if your bot has been added to your server.
SyntaxError: Invalid regular expression flags
Your Node.js version is older than 16.9.0
Double check your node version by typing node -v in your console, or download the newest version here.
SyntaxError: Unexpected token
Your Discord Bot’s token is incorrect, or you regenerated a new one
Double check your token.json file to make sure you token is correct and does not include any trailing spaces. Also check if you regenerated your token, and re-copy it in.
Error contains ZodError
A name, description, or reply has been set incorrectly in one of your command files.
Double check the names of all your commands in the .setName() field to make sure you only have lowercase letters as your command name. Also check you have not left out the description or reply fields in your file.
Error contains Invalid Form Body
You have given your both an invalid command, the bot is trying to do something you haven’t allowed it to do, or the bot does not know what you are trying to do.
First, re-register your commands by typing node runCommands.js in your terminal. Then, restart the bot either by typing rs into the terminal if you are using nodemon, or use Ctrl+C. Otherwise, you will have to look through Discord’s error code table to see which error you got.