Fatal error: Uncaught Error: Call to undefined function call_user_func() in /www/wwwroot/saas.mituyun.com/vendor/composer/autoload_real.php:35 Stack trace: #0 /www/wwwroot/saas.mituyun.com/vendor/autoload.php(7): ComposerAutoloaderInit4f31915a0c57106ddb62e3cc14762462::getLoader() #1 /www/wwwroot/saas.mituyun.com/public/index.php(38): require('...') #2 {main} thrown in /www/wwwroot/saas.mituyun.com/vendor/composer/autoload_real.php on line 35