This is most likely because you last logged in before a security upgrade (2025-03-24). Please refresh the page, log out and log back in.
This is most likely because you created your account with Google. In that case, you'll need to log in via "Sign in with Google" and not with the email and password fields. If you want to sign in with your email and password instead, see below.
Sure. Please contact us and let us know which account (email) to transfer it to.
Up to 3 teams with the free plan and unlimited teams with Buzzinga Pro. However, for Pro users, we recommend no more than 10 teams to keep the game fun and engaging for everyone.