I am trying to make a multisite maketplace.

I am in the process of making a multisite marketplace (like ETSY).

I am unable to make a template page using the tutorial on mp frontend's site. Here is the website http://mp-frontend.info/wordpress-marketplace-tutorial/new-blog-templates/

I got stuck at this stage. I was able to follow the instructions, however the template page remains blank. I also could not go to template.yoursite.com/wp-admin. That page is blank. Even when i go do it at the back end it wont let me edit my template site. I can't go to dashboard etc on the template. I am able to go to the mainsite without any problems.

Anyone here has any experience with this.