Alpha editor won't load if not deployed as ROOT.war

When deploy as anything other than ROOT.war (which implies root context path), alpha editor won't load. It will display a message "Need a URL in the form .../project/translate/project-slug/v/version-slug/doc-id-with-slashes?lang=locale-id e.g. project/translate/my-project/v/my-version/document.txt?lang=fr"