Crash on checking out branch from browser

Steps:
1. Go to any Bitbucket repository in browser https://bitbucket.org/
2. Navigate to "Branches"
3. Select any branch
4. Click "Checkout" => "Checkout in sourcetree"
5. Click "Open sourcetree" in browser popup.
6. Click "Checkout" in Sourcetree "URL actions" popup

Actual Result:
Application is crashed.

Expected Result:
Selected branch is checked out and is active.