Error with fullcalendar Javascript

Question

I’m trying to import the fullcalendar in a project, I’m using the Gulp to automate imports. However, when I set out to import fullcalendar I come across this error on the console:

fullcalendar.min.js:6Uncaught Typeerror: Cannot read Property 'push' of Undefined

What could be the problem?

Archive of gulp:

elixir(function(mix) {
    mix.styles([
        './resources/assets/css/app.css',
        './bower_components/fullcalendar/dist/fullcalendar.print.min.css',
        './bower_components/fullcalendar/dist/fullcalendar.min.css',
    ]);
    mix.scripts([
        './bower_components/jquery/dist/jquery.min.js',
        './node_modules/angular/angular.min.js',
        './resources/assets/js/mask.js',
        './bower_components/fullcalendar/dist/fullcalendar.min.js',
        './resources/assets/js/app.js'
    ]);
});