Warning: Invalid Path

A PHP Error was encountered

Severity: Warning
Message: mkdir(): Invalid path
Filename: drivers/Session_files_driver.php
Line Number: 117

Backtrace:

File: C:\Program Files (x86)\EasyPHP-Devserver-16.1\eds-www\CompanyProfileCI\application\controllers\cpages.php
Line: 34
Function: library

File: C:\Program Files (x86)\EasyPHP-Devserver-16.1\eds-www\CompanyProfileCI\index.php
Line: 315
Function: require_once

An uncaught Exception was encountered
Type: Exception
Message: Session: Configured save path '' is not a directory, doesn't exist or cannot be created.

Filename: C:\Program Files (x86)\EasyPHP-Devserver-16.1\eds-www\CompanyProfileCI\system\libraries\Session\drivers\Session_files_driver.php
Line Number: 119
Backtrace:


File: C:\Program Files (x86)\EasyPHP-Devserver-16.1\eds-www\CompanyProfileCI\application\controllers\cpages.php
Line: 34
Function: library

File: C:\Program Files (x86)\EasyPHP-Devserver-16.1\eds-www\CompanyProfileCI\index.php
Line: 315
Function: require_once

------------------------------------------------

drivers/Session_files_driver.php
line 117:              if ( ! mkdir($save_path, 0700, TRUE))

controllers\cpages.php
line34:      $this->load->library('session');

drivers\Session_files_driver.php
line 119:                       throw new Exception("Session: Configured save path '".$this->_config['save_path']."' is not a directory, doesn't exist or cannot be created.");


Where to find this error:  File: C:\Program Files (x86)\EasyPHP-Devserver-16.1\eds-www\CompanyProfileCI\index.php
Line: 315
Function: require_once  ?

Thanks in advance.

after checking this kid's reputation I'm wondering if she is a CI hater or something? I advice to read the manual first specially @ PHP.NET before using CI. 

God Bless CI Contributors