JS-Fehler bei der Installation

Uncaught TypeError: Cannot read property 'getAttribute' of null
    at window.elData (http://leopard.ingamed.de/test/js/wcf.globalHelper.js?v=1472465754:120:18)
    at UiPageMenuMain._initHeader (http://leopard.ingamed.de/test/js/WoltLabSuite/Core/Ui/Page/Menu/Abstract.js:295:57)
    at UiPageMenuMain.init (http://leopard.ingamed.de/test/js/WoltLabSuite/Core/Ui/Page/Menu/Abstract.js:43:9)
    at UiPageMenuMain.init (http://leopard.ingamed.de/test/js/WoltLabSuite/Core/Ui/Page/Menu/Main.js:23:41)
    at new UiPageMenuMain (http://leopard.ingamed.de/test/js/WoltLabSuite/Core/Ui/Page/Menu/Main.js:17:35)
    at Object._initMobileMenu (http://leopard.ingamed.de/test/js/WoltLabSuite/Core/Ui/Mobile.js:188:21)
    at Object._init (http://leopard.ingamed.de/test/js/WoltLabSuite/Core/Ui/Mobile.js:93:9)
    at Object.on (http://leopard.ingamed.de/test/js/WoltLabSuite/Core/Ui/Screen.js:59:16)
    at Object.setup (http://leopard.ingamed.de/test/js/WoltLabSuite/Core/Ui/Mobile.js:52:13)
    at Object.setup (http://leopard.ingamed.de/test/js/WoltLabSuite/Core/Bootstrap.js:60:13)