The building tool is very strict
when it comes to certain html tags
Make sure that your
<html> <body> </body> </html>
tags are in the CORRECT place and you only have
ONE SET IN YOUR CODE
OR YOU WILL NOT BE ABLE TO USE THE BUILDING TOOL TO EDIT YOUR SITE
As the building tool STARTS rendering at the FIRST <body> tag
and will STOP rendering at the FIRST </body> tag