Problem with Database Sessions

When i try to execute any controller in my codeignite project i recieve this error:

Code:

Fatal error: Class CI_Session_files_driver contains 1 abstract method and must therefore be declared abstract or implement the remaining methods (SessionHandlerInterface::read) in D:\Git\crud-farm\system\libraries\Session\drivers\Session_files_driver.php on line 49
A PHP Error was encountered

Severity: Error

Message: Class CI_Session_files_driver contains 1 abstract method and must therefore be declared abstract or implement the remaining methods (SessionHandlerInterface::read)

Filename: drivers/Session_files_driver.php

Line Number: 49

Backtrace:

Duplicate of http://forum.codeigniter.com/thread-64763.html

Duplicate of http://forum.codeigniter.com/thread-64763.html

Much thanks. Problem solved restarting apache.