wp-bootstrap-navwalker

I am developing a theme to submit to the WordPress directory. I have used the wp-bootstrap-navwalker: https://github.com/twittem/wp-bootstrap-navwalker/tree/For-Bootstrap-2.3.2 for it but I am getting a following js error in admin side. Error: Uncaught Error: Syntax error, unrecognized expression: https://localhost/wordpress3.7.1/wp-admin/nav-menus.php?action=locations in my chrome console panel.
Please note: I have no plugins activated so this is coming from the theme.

Any help will be much appreciated.

Thank you,