I have fixed it. There were two bugs,
- sidebar_admin_head is not called
- The script passed the full path of the javascript files (full path in your hard drive) to the browser and the browser is not able to load the javascripts.
After fixing the first one, I see the widgets in the admin menu but unable to drag it. Then I found that the path to the javasctipts are wrong in the <script> tag. Now both the bugs are fixed and uploaded the updated widgets.php in url below
https://www.blisspark.com/wp-widgets-fix/widgets.zip
