I created a project using CI(version 3.0.0), and it works perfectly in XAMPP localhost. And i upload that project to sub domain then its giving an error Click here.
Change the name of your controller, model, and other your class to Capitalize.
Example : your own controller test.php change to Test.php
test.php
Test.php
It should be work.
Its because your server is Linux, and Linux is case sensitive.