Problem adding CKEditor on a textarea

I have a website that when I press a button(image1), I load with Ajax one <textarea class="ckeditor">(image2) to be replaced by the editor, but this does not work. I tried reloading the ckeditor.js script again with the function

CKEDITOR.scriptLoader.load ('Scripts / ckeditor / ckeditor.js'});

but does not work and the code seems correct (image3).