Message: Undefined property: ::$input or $uri

[eluser]Unknown[/eluser]
For the people who have the same problem

Replacing this

Code:

$_is_loaded[strtolower($class)] = $class;

with this

Code:

$_is_loaded[mb_strtolower($class, 'UTF-8')] = $class;

at system/core/Common.php line 196

solves the problem