Warning: require(C:\xampp\composer\vendor\autoload.php): Failed to open stream: No such file or directory in C:\xampp\htdocs\senmonitoring\contact.php on line 7

Fatal error: Uncaught Error: Failed opening required 'C:\xampp\composer\vendor\autoload.php' (include_path='C:\xampp\php\PEAR') in C:\xampp\htdocs\senmonitoring\contact.php:7 Stack trace: #0 {main} thrown in C:\xampp\htdocs\senmonitoring\contact.php on line 7