Getting Error: "Gallery2 must be installed under the same document root as Drupal"

My Drupal site is installed under http://www.mysite.com/.
My gallery site is installed in http://www.mysite.com/gallery2/

When attempting to configure G2Drupal I keep getting the following error message "Gallery2 must be installed under the same document root as Drupal".

I've tried to input my actual server path in "Gallery2 Server Path" of the configuration page as follows /home/content/55/5555555555/html/gallery2/ but to no avail.

Please help