I did not get an error message when using your layout.
however, one thing I do notice is that there is a line added to attach a js/debug_plus.js file, but this file is empty in the layout:
<script type="text/javascript" src="sitesculptor_assets/content/js/debug_plus.js"></script>
sometimes if you use the ctrl+c(command+c for mac) copy keybord command when an error window is open, it will copy the error message to the clip board, perhaps you could copy the error to you message this way?
Or a screen shot showing the error may be helpful.
