Ooopsie, forgot to remove the lock. It's been removed and you should be able to easily change your password.
There was a spate of compromised accounts a few months ago, so any account that didn't have any activity in over a year was reset with a lock. This is why it's important to keep your info current in your profiles. If you change emails and don't put the changes in, you'll be permanently locked out of your account with no way to change your password.