Warning: require_once(core.php): Failed to open stream: No such file or directory in C:\Apache24\htdocs\plugins\XmlImportExport\pages\export.php on line 25

Fatal error: Uncaught Error: Failed opening required 'core.php' (include_path='.;C:\php\pear') in C:\Apache24\htdocs\plugins\XmlImportExport\pages\export.php:25 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\plugins\XmlImportExport\pages\export.php on line 25