Fatal error: Uncaught TypeError: Return value of Composer\Autoload\ClassLoader::initializeIncludeClosure() must be an instance of Composer\Autoload\void, none returned in /www/htdocs/w00d4861/sinnzeit/wp-content/plugins/ninja-forms/vendor/composer/ClassLoader.php:580 Stack trace: #0 /www/htdocs/w00d4861/sinnzeit/wp-content/plugins/ninja-forms/vendor/composer/ClassLoader.php(112): Composer\Autoload\ClassLoader::initializeIncludeClosure() #1 /www/htdocs/w00d4861/sinnzeit/wp-content/plugins/ninja-forms/vendor/composer/autoload_real.php(26): Composer\Autoload\ClassLoader->__construct('/www/htdocs/w00...') #2 /www/htdocs/w00d4861/sinnzeit/wp-content/plugins/ninja-forms/vendor/autoload.php(25): ComposerAutoloaderInitf9e89c080e1f0c34e75abe14600cb028::getLoader() #3 /www/htdocs/w00d4861/sinnzeit/wp-content/plugins/ninja-forms/blocks/ninja-forms-blocks.php(7): require('/www/htdocs/w00...') #4 /www/htdocs/w00d4861/sinnzeit/wp-content/plugins/ninja-forms/ninja-forms.php(370): require_once('/www/htdocs/w00...') #5 /www/htdocs/w00d486 in /www/htdocs/w00d4861/sinnzeit/wp-content/plugins/ninja-forms/vendor/composer/ClassLoader.php on line 580