How i can insert data in ckeditor textarea

i am trying to edit a textarea whis is ckeditor but iam facing issue if some one kown please tell me.

HTML CODE

  <div class="col-md-12">
                <a class="btn btn-primary pull-right" id="nextdiv">
                    <i class="fa fa-plus"></i>
                </a>
                {!! Form::label('content', __('lang_v1.content') . ':*') !!}
                <div id="editor-container">
                    <div class="printableArea ck-editor__editable_inline">
                        {!! Form::textarea('content[]', null, [
                            'class' => 'form-control editor updateEditor',
                            'placeholder' => __('lang_v1.content'),
                            'id' => 'editor',
                        ]) !!}
                    </div>
                </div>
                <div id="container"></div>
            </div>

js code
$(“.template”).on(‘change’, function() {

$.ajax({
url: ‘/get/template/data/’ + templateId,
type: ‘GET’,
success: function(response) {
console.log(response.content)
CKEDITOR.instances[‘editor’].setData(response.content);
}
)}
}

IT GIVE THIS ERROR
TypeError: Cannot read properties of undefined (reading ‘editor’)

WHERE IS ISSUE I AM DOING