Link buttons not working

Hi thank. It really was the config.php file.
I set the 'base_url' in the config.php file to my server ip (If someone is reading this thread in the future make sure you not forget the http:// prefix and the / suffix).
I also set the index page to the right value (empty string in my case because my server start file is set to index.php).

Now everything is working and I can continue with the tutorial.

Thank you very much guys!