A PHP Error was encountered

Severity: Error

Message: Call to a member function load() on a non-object

Filename: libraries/Email.php

Line Number: 2309

Backtrace:

이게 왜 뚤까요? ㅠ 항상 보내듯이 보냇는데요 

$this->load->library('email');

$this->email->from('***@***.com', '***');

$this->email->to($to);

$this->email->subject($title);

$this->email->message($msg);

$this->email->send();

아시는분 도움좀주세요 ㅠㅠ