Hi Syabab,
Is it in your applications list in EasySocial's backend? If it's not set as default application, you would need to install it in the frontend for the application to be usable.
If you are still having issues regarding this, can you provide us your backend access at http://stackideas.com/dashboard/site so we can check your site for you. Thanks.

Hi,

Still can't find it

I already provide access to backend

Thanks.

You need to install the app separately from https://stackideas.com/apps/item/3350-notes . Can you download and install it?