Code works in jsfiddle but not in Localhost or Server: Laravel 6

I am working with DataTable in Laravel 6

I want to add Custom Buttons as Dropdown. Working in JSFIDDLE But not in Localhost or Server.

https://jsfiddle.net/qmyf2d9r/7/

All of my js list:

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
    <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.1.1/js/bootstrap.min.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.3/umd/popper.min.js"></script>
    <!-- <script src="https://unpkg.com/@coreui/coreui/dist/js/coreui.min.js"></script> -->
    <script src="//cdn.datatables.net/1.10.19/js/jquery.dataTables.min.js"></script>
    <script src="https://cdn.datatables.net/1.10.19/js/dataTables.bootstrap4.min.js"></script>
    <script src="//cdn.datatables.net/buttons/1.2.4/js/dataTables.buttons.min.js"></script>
    <script src="//cdn.datatables.net/buttons/1.2.4/js/buttons.flash.min.js"></script>
    <script src="https://cdn.datatables.net/buttons/1.2.4/js/buttons.html5.min.js"></script>
    <script src="https://cdn.datatables.net/buttons/1.2.4/js/buttons.print.min.js"></script>
    <script src="https://cdn.datatables.net/buttons/1.2.4/js/buttons.colVis.min.js"></script>
    <script src="https://cdn.rawgit.com/bpampuch/pdfmake/0.1.18/build/pdfmake.min.js"></script>
    <script src="https://cdn.rawgit.com/bpampuch/pdfmake/0.1.18/build/vfs_fonts.js"></script>
    <script src="//cdnjs.cloudflare.com/ajax/libs/jszip/2.5.0/jszip.min.js"></script>
    <script src="https://cdn.datatables.net/select/1.3.0/js/dataTables.select.min.js"></script>
    <script src="https://cdn.ckeditor.com/ckeditor5/11.0.1/classic/ckeditor.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.22.2/moment.min.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-datetimepicker/4.17.47/js/bootstrap-datetimepicker.min.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/select2/4.0.5/js/select2.full.min.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/dropzone/5.5.1/min/dropzone.min.js"></script>
    <script src="{{ asset('js/main.js') }}"></script>