Use the Windows Control Panel to uninstall Sourcetree.
Authentication components in Sourcetree often rely on underlying Windows security protocols. sourcetree download of mercurial credential manager failed
Older versions of Sourcetree may attempt to use deprecated protocols (like TLS 1.0/1.1) that modern servers no longer support. How to Fix the Mercurial Credential Manager Error 1. Use a Standalone Mercurial Installation Use the Windows Control Panel to uninstall Sourcetree
Ensure your OS is fully updated, as newer versions of Sourcetree require updated system libraries to manage the Windows Credential Manager properly. 4. Clean Reinstall (Nuclear Option) sourcetree download of mercurial credential manager failed
If the error prevents you from using the app at all, you can manually disable Mercurial support to bypass the prompt.