error

Hello
Fusion 4.68.1 has error ( i saw in error_log)
PHP Warning: require_once(./__swift/config/config.php) [<a href='function.require-once'>function.require-once</a>]: failed to open stream: No such file or directory in /home/otdelpodderzki/public_html/__swift/library/class.SWIFT.php on line 108
What is wrong?