[Fri Jan 03 12:40:32.560970 2020] [:error] [pid 724] [client 217.76.104.74:45913] PHP Fatal error: Uncaught TypeError: Return value of Shopware\\Core\\Framework\\FeatureFlag\\FeatureConfig::registerFlag() must be an instance of Shopware\\Core\\Framework\\FeatureFlag\\void, none returned in /var/www/html/vendor/shopware/core/Framework/FeatureFlag/FeatureConfig.php:12\nStack trace:\n#0 /var/www/html/vendor/shopware/core/Flag/feature_next733.php(7): Shopware\\Core\\Framework\\FeatureFlag\\FeatureConfig::registerFlag('next733', 'FEATURE_NEXT_73...')\n#1 /var/www/html/vendor/composer/autoload_real.php(66): require('/var/www/html/v...')\n#2 /var/www/html/vendor/composer/autoload_real.php(56): composerRequireb297811b26125ec7bf9934987f0cbb0c('afb484960f7f56e...', '/var/www/html/v...')\n#3 /var/www/html/vendor/autoload.php(7): ComposerAutoloaderInitb297811b26125ec7bf9934987f0cbb0c::getLoader()\n#4 /var/www/html/public/index.php(15): require('/var/www/html/v...')\n#5 {main}\n thrown in /var/www/html/vendor/shopware/core/Framework/FeatureFlag/FeatureConfig.php on line 12