Dropdown tollbar not working

[wahmal]

I'am using this plugin on materializecss v1.0.0-rc.2, But dropdown toolbar not show content. I'am getting error on my console :

materialize.min.js:6 Uncaught TypeError: Cannot set property 'tabIndex' of null at n.value (materialize.min.js:6) at new n (materialize.min.js:6) at Function.value (materialize.min.js:6) at Function.value (materialize.min.js:6) at n.fn.init.jQuery.fn.(anonymous function) [as dropdown] (http://localhost/kemenag_ptsp/app/assets/js/materialize.min.js:6:13194) at n.fn.init.materialnote (materialnote.js:1882) at HTMLDivElement.<anonymous> (create:393) at Function.each (datatables.min.js:14) at HTMLDocument.<anonymous> (create:392) at i (datatables.min.js:14)