Community Auth Learning...

I tried accessing /examples/create_user
Now I have this error message?

Code:

A PHP Error was encountered

Severity: Warning

Message: mt_rand(): max(-1) is smaller than min(1200)

Filename: controllers/Examples.php

Line Number: 433

Backtrace:

File: C:\xampp\htdocs\ci\ci3-community-auth\application\controllers\Examples.php
Line: 433
Function: mt_rand

File: C:\xampp\htdocs\ci\ci3-community-auth\application\controllers\Examples.php
Line: 183
Function: _get_unused_id

File: C:\xampp\htdocs\ci\ci3-community-auth\index.php
Line: 292
Function: require_once

What could be possibly the reason, help please?