CKeditor Uncaught TypeError: Cannot read properties of undefined (reading ‘p_Ack’)?

I want to send data to the database with Ckeditor, but I get the error “Cannot read properties of undefined (reading ‘p_Ack’)”. The editor I’m using is ckeditor’s document bundle editor where exactly am I going wrong?

<div class="card card-custom">
<div class="card-body">
<div id="kt-ckeditor-3-toolbar"></div>
<div id="p_Ack">
</div>
</div>
</div>

<script>

var KTCkeditorDocument = function () {
   var demos = function () {
       DecoupledEditor
         .create(document.querySelector('#p_Ack'))
         .then(editor => {
 const toolbarContainer = document.querySelector('#kt-ckeditor-3-toolbar');
 toolbarContainer.appendChild(editor.ui.view.toolbar.element);
})
 }

 return {
 // public functions
     init: function () {
     demos();
     }
 };
        }();
        // Initialization
        jQuery(document).ready(function () {
            KTCkeditorDocument.init();
        });
</script>

'Desc': KTCkeditorDocument.instances['p_Ack'].getData(),