how to fix Warning: require_once and Fatal error: require_once(): Failed opening required in php [duplicate]

Warning: require_once(C:/wamp64/www\sourcecodester\ERIS\include\config.php): failed to open stream: No such file or directory in C:\wamp64\www\eris\eris\include\initialize.php on line 16

Fatal error: require_once(): Failed opening required 'C:/wamp64/www\sourcecodester\ERIS\include\config.php' (include_path='.;C:\php\pear') in C:\wamp64\www\eris\eris\include\initialize.php on line 16