Going through the installer and hitting the second step where you need to register or login with existing Atlassian account, clicking Bitbucket produces the following error message after trying to go to the url below.

This effectively prevents installation from continuing and we are unable to continue using Sourcetree.

https://bitbucket.org/site/oauth2/authorize?response_type=code&client_id=HJdmKXV87DsmC9zSWB&state=authenticated&scope=account%20account:write%20team%20team:write%20repository%20repository:write%20repository:admin%20pullrequest%20pullrequest:write%20snippet%20snippet:write%20issue%20issue:write%20wiki%20email%20webhook%20project%20project:write&redirect_uri=http://localhost:34106/