Why login says 'Invalid email or password' or is temporarily blocked

For security, sign-in attempts are rate-limited. If there are too many failed attempts in a short window — roughly 8 tries for one account within 15 minutes, or many attempts from the same network — further logins are temporarily refused, even with the correct password. In that case, wait about 15 minutes and try again. Note that the login error is intentionally generic ('Invalid email or password'): it appears whether the email is unknown, the password is wrong, or the limit was hit, so attackers can't learn which. Also check that Caps Lock is off, that you're using the email you registered with, and that you don't have an old saved password autofilling. If you see 'Account is blocked', your account has been restricted — contact support. If you genuinely can't remember your password, request a reset via support.