the blank page is caused by a combination of 2 things.
1. your theme is resetting.
2. when a theme resets, WordPress looks for the default theme to load. There is something wrong with your default theme as well since this:
provides a blank page, and should NOT.
Themes 'reset' when they are broke, or when WP cannot find things properly.
In your case, THIS:
You have nested the theme inside an extra directory.
It ought to be this:
Fix that, and see if the theme resetting doesnt stop. And if it doesn't, then you need to fix your default problem as well, since WP isnt loading it properly.