[eluser]Unknown[/eluser]
For beginners like me, who are using WAMP and are receiving the same error as that on the top where the url seems to be concatenated or doubled after clicking submit, the error was because of the base url being set by you, which was instructed in the tutorial as a must.
I also solved this problem thanks to the solution shown by InsiteFX there, to just leave the base url in the application\config\config.php as blank.
