Fatal error: Uncaught Exception: Composer autoloader could not be found. Install dependencies with `composer install` and try again. in C:\laragon\www\bkkdemak\vendor\phpoffice\phpspreadsheet\samples\Bootstrap.php:22 Stack trace: #0 C:\laragon\www\bkkdemak\vendor\phpoffice\phpspreadsheet\samples\Header.php(11): require_once() #1 C:\laragon\www\bkkdemak\vendor\phpoffice\phpspreadsheet\samples\index.php(3): require_once('C:\\laragon\\www\\...') #2 {main} thrown in C:\laragon\www\bkkdemak\vendor\phpoffice\phpspreadsheet\samples\Bootstrap.php on line 22