Invalid username or password error when logging into Bitbucket through Sourcetree

[Tyrith]

I formatted my hard drive recently so I reinstalled SourceTree in order to clone my repository to work on it. After installed SourceTree, I logged onto Bitbucket, found the repository I wanted to clone, pressed clone via SourceTree, and immediately started running into errors. Basically, no matter what method I use, OAuth, password or anything else I have tried, SourceTree tells me that my credentials are either wrong, or I am not allowed to use Bitbucket api 2.0. I cloned a Github repository with no issues and so I have no idea what or where the problem is. I am able to log onto Bitbucket via a browser with no problem and can view the repository in question, but I am unable to clone it via SourceTree to my computer.