Nederwijndomein

I have my webshop running at example.com with search friendly url's activated. I want to add a new store to my website, but I get several errors, I set up the 2nd store at example.com/store2 but I get the message: This is a basic stack overflow, and I could find solutions on how to fix it in the htaccess file for cakePHP and for Wordpress, but I cannot figure out how to do this for prestashop.