What is the common error message when including files in PHP and how can it be resolved?

The common error message when including files in PHP is "Warning: include(/path/to/file.php): failed to open stream: No such file or directory". This error occurs when the specified file path is incorrect or the file does not exist. To resolve this issue, ensure that the file path is correct and the file exists in the specified location.

<?php
// Correcting the file path to resolve the include error
include 'path/to/file.php';
?>