Warning: require_once(vendor/autoload.php): Failed to open stream: No such file or directory in D:\xampp\htdocs\MieleService\library\miele\php\common-functions.php on line 7

Fatal error: Uncaught Error: Failed opening required 'vendor/autoload.php' (include_path='D:\xampp\php\PEAR') in D:\xampp\htdocs\MieleService\library\miele\php\common-functions.php:7 Stack trace: #0 D:\xampp\htdocs\MieleService\mieleservice\app.inc(5): include_once() #1 D:\xampp\htdocs\MieleService\mieleservice\index.php(2): require_once('D:\\xampp\\htdocs...') #2 {main} thrown in D:\xampp\htdocs\MieleService\library\miele\php\common-functions.php on line 7