Can't Clone Git Respository in SourceTree: Failed to connect....No error

While attempting to clone a Git based repository in Stash via the SourceTree client, I received the following error: fatal: unable to access ‘http://[email protected]:443/repo.git/': Failed connect to company.local:443; No error No error obviously doesn’t give many clues, however this post suggested something to do with proxy settings. My web browsers were configured to use an internal web proxy via an automatic configuration script and I could successfully navigate to the repository via a web browser.