Error Codes - 403 (Access Denied)

This is an html error. Either your password is wrong, you need to add your 2 factor authentication code, or you need to solve the captcha on the website.

If you have 2FA enabled, you cannot use the command-line (CLI) version of Parsec, as it has no functionality to accept 2FA codes.

If you're using the CLI version of Parsec and are using saved login details, your token has likely expired and you will need to log in again.