What are the potential causes of the error message "The file 'http://localhost/dummy.php' could not be found" when using Zend Debugger with PHP?

The error message "The file 'http://localhost/dummy.php' could not be found" typically occurs when the file path specified in the Zend Debugger configuration is incorrect or the file does not exist at the specified location. To solve this issue, ensure that the correct file path is provided in the debugger configuration settings and that the file actually exists at that location.

// Example of correct file path configuration in Zend Debugger
$debugger = new Zend_Debugger();
$debugger->setDebugResource('http://localhost/yourfile.php');
$debugger->startDebug();