ProjectConfig.5.5.php): failed to open stream: No such file or directory in

Hi.
Could you help me?
I have this massege:
[12-Oct-2015 07:23:22 UTC] PHP Warning: require(/home/mepoeigi/public_html/admin/config/ProjectConfig.5.5.php): failed to open stream: No such file or directory in /home/mepoeigi/public_html/admin/config/ProjectConfig.php on line 1
[12-Oct-2015 07:23:22 UTC] PHP Fatal error: require(): Failed opening required '/home/mepoeigi/public_html/admin/config/ProjectConfig.5.5.php' (include_path='.:/usr/lib/php:/usr/local/lib/php') in /home/mepoeigi/public_html/admin/config/ProjectConfig.php on line 1
What the matter?

Best regards,
Alex