I updated to SourceTree v2.7.2 on my Mac and when doing a push/pull/fetch I receive the error:
git -c diff.mnemonicprefix=false -c core.quotepath=false -c credential.helper=sourcetree fetch origin
fatal: could not read Username for 'https://bitbucket.org': Device not configured
This issue happened immediately after update. I've tried Basic SSH and HTTPS, as well as OAuth and removing the Sourcetree folder from my library folder. No luck.