Warning: require(C:\xampp\htdocs\tienda\app/index.php): failed to open stream: No such file or directory in C:\xampp\htdocs\tienda\index.php on line 30

Fatal error: require(): Failed opening required 'C:\xampp\htdocs\tienda\app/index.php' (include_path='C:\xampp\php\PEAR') in C:\xampp\htdocs\tienda\index.php on line 30