I tried to answer a question where Gmail thinks someone is trying to access your account. The question mentions the person has VPN. But Stack Exchange prevents me giving an answer as I don't have 50 points yet. How does Stack Exchange get any answers from newbies ever?
Maybe you tried to post your answer as a comment as the privilege that requires 50 reputation points is comment everywhere. new user restrictions, including answering protected questions, are lift when a user reach 10 reputation points.
Please read the first link to learn about how comments should be used on this site.