Im trying to push to github with sourcetree but get the following error:
git -c diff.mnemonicprefix=false -c core.quotepath=false push -v --tags origin
I found the answer here, it is a known bug for version 2.1.8+
The following steps fixed it for me:
Tools > Options > Git > Update Embedded Git
Also pushing with the command line works.
EDIT
Also adding @Latisha's answer:
1. Do the above.
2. Close Sourcetree
3. Delete AppData\Local\Atlassian\SourceTree\passwd
4. Restart SourceTree