After purchasing an additional site license I’ve followed instructions from http://ellislab.com/expressionengine/user-guide/cp/sites/additional_sites.html
When I get to “Create New Site” page I get following error: “Fatal error: Call to a member function result() on a non-object in [MY SERVER PATH]/expressionengine/views/sites/edit_form.php on line 80”
The page stops rendering on the “File Upload Preferences” section. Obviously, there is no way to complete the site setup process.