There can be several reasons why you're unable to log in. Most of the time, you'll receive an error message that provides a clue about what's going wrong. Here are some common issues and their fixes:
Incorrect Username: Make sure you're using your username to log in, not your email address. It's a common mistake to mix these up. If you don't remember your username you can use this guide.
Incorrect Password: Double-check that you're entering your password correctly. Remember, passwords are case-sensitive. If you don't remember your password you can use this guide to change it.
Two-Factor Authentication (2FA) Issues: If you have 2FA enabled but can't remember your 2FA code, you'll need to follow the process for recovering or resetting your 2FA credentials.
Account Blocked: If you see a message stating your account is blocked, refer to this article for steps on how to address the issue.