Zend certified PHP/Magento developer

Magento HTTP 500 error

after a clean install, i’ve gone through the installation proces. At the last install step something has gone wrong, and afterwards i was getting HTTP error 500. I activated display errors, and now i get the following error:

Fatal error: Uncaught RuntimeException: Source class “MagentoEavModelAdminhtmlSystemConfigSourceInputtype” for “MagentoEavModelAdminhtmlSystemConfigSourceInputtypeFactory” generation does not exist. in /data/sites/web/toolnextbe/www/vendor/magento/framework/Code/Generator.php:218 Stack trace: #0 /data/sites/web/toolnextbe/www/vendor/magento/framework/Code/Generator.php(124): MagentoFrameworkCodeGenerator->tryToLoadSourceClass(‘MagentoEavMod…’, Object(MagentoFrameworkObjectManagerCodeGeneratorFactory)) #1 /data/sites/web/toolnextbe/www/vendor/magento/framework/Code/Generator/Autoloader.php(35): MagentoFrameworkCodeGenerator->generateClass(‘MagentoEavMod…’) #2 [internal function]: MagentoFrameworkCodeGeneratorAutoloader->load(‘MagentoEavMod…’) #3 [internal function]: spl_autoload_call(‘MagentoEavMod…’) #4 /data/sites/web/toolnextbe/www/vendor/magento/framework/ObjectManager/Relations/Runtime.php(38): class_exists(‘MagentoEavMod…’) #5 /data/sites/web/toolnextbe/www/ in /data/sites/web/toolnextbe/www/vendor/magento/framework/Code/Generator.php on line 218

Anyone knows how to resolve this?

Thanks!