tinynav not visible

Since the last theme update the navigation will not work on smartphones. After taking a look in the browser source code, I noticed that the source code of the demo is different. After the first search, it seems as if the jQuery is not done correctly. At least the tinynav neither generated nor displayed. I have the theme now tried on three different instances and always get a faulty front end. I need urgent help here, because the website may not be relaunched. I use: Wordpress 3.8-en_US and catchMustang 2.3