title: Image Upload in ckeditor5-react
body: <p>I have been seeking for any thread with the related issue, but couldn't find one, I'm trying to set an image upload for <strong>ckeditor5-react</strong>, picking up a file via file browser works fine but I get an <strong>alert</strong> "cannot upload file" </p>
  
  <p><img src="https://i.stack.imgur.com/FQZQN.png" alt=""></p>
  
  <p>Here is my code below:</p>
  
  <pre><code>&lt;CKEditor
      editor={ ClassicEditor } 
      onChange={ ( event, editor ) =&gt; console.log( { event, editor } ) }
      config={{
           ckfinder:{uploadUrl: "/uplaodImageFromEditor"}
        }}
      UploadAdapter={FileRepository}
   /&gt;
  </code></pre>