Mobile Menu won't Colaspe

Good morning everyone. Im not sure if this is the right forum or not but here’s my question. I’m running iThemes Builder using the Hudson theme on a WordPress site with WP 4.1 on it. The mobile menu will not collapse the submenus. It used to work properly usinng 4.0.1. I have tried many suggestions without success. I have installed the site from scratch as well with the 4.1 and still have the problem that the submenus will not collapse. Please help. Thank you.