Fatal error: Uncaught Error: Call to undefined function call_user_func() in /www/wwwroot/backend/vendor/composer/autoload_real.php:32 Stack trace: #0 /www/wwwroot/backend/vendor/autoload.php(22): ComposerAutoloaderInit53b5d56b3b7e3cbac1713e68c8850f6c::getLoader() #1 /www/wwwroot/backend/public/index.php(15): require('...') #2 {main} thrown in /www/wwwroot/backend/vendor/composer/autoload_real.php on line 32