Warning: require_once(C:\xampp\htdocs\ajax/../../core/php/core.inc.php): Failed to open stream: No such file or directory in C:\xampp\htdocs\ajax\user.ajax.php on line 20

Fatal error: Uncaught Error: Failed opening required 'C:\xampp\htdocs\ajax/../../core/php/core.inc.php' (include_path='C:\xampp\php\PEAR') in C:\xampp\htdocs\ajax\user.ajax.php:20 Stack trace: #0 {main} thrown in C:\xampp\htdocs\ajax\user.ajax.php on line 20