Issue of integrating elFinder to Summernote

I have integrated successfully elFinder to Summernote (WYSIWYG) by following these instructions. But I'm facing one problem when I attempt to add another image by clicking to load the dialog again. It seems like elFinder cannot find the path to image folder again.

• The tree list folder structure doesn't show up
• The thumbnail shows the 'Panda Icon' indicating that those images are not found

But the image does insert to the textarea, when I select the not found thumbnail.

How can I fix this?