It should be easy to re-produce because i only run the wizard and deleted all the pages except the login.php and logout.php (just for testing/debug purpose) and did not do any changes besides selecting 2 columns in the database to be used.
Then the page is created as attached, refering to a validation function which does not exist nor included in the login.php page.
I don't know which code should be inserted though but i'm sure you'll figure it out :-)