not find "vendor/autoload.php"

[jiazufei1]

Fatal error: Uncaught Error: Failed opening required '/www/wwwroot/WoWSimpleRegistration/application/vendor/autoload.php' (include_path='.:') in /www/wwwroot/WoWSimpleRegistration/application/loader.php:20 Stack trace: #0 /www/wwwroot/WoWSimpleRegistration/index.php(32): require_once() #1 {main} thrown in /www/wwwroot/WoWSimpleRegistration/application/loader.php on line 20