I solved the CAPTCHA and logged in about 5 times and restarted SourceTree. I still cannot use the tool. I continue to receive the message below.

fatal: remote error: CAPTCHA required

Your Bitbucket account has been locked. To unlock it and log in again you must

solve a CAPTCHA. This is typically caused by too many attempts to login with an

incorrect password. The account lock prevents your SCM client from accessing

Bitbucket and its mirrors until it is solved, even if you enter your password

correctly.

 __ 

If you are currently logged in to Bitbucket via a browser you may need to

logout and then log back in in order to solve the CAPTCHA.