when I install a new theme I do this commands via Putty:
php bin/magento setup:upgrade
how can I fix this problem? I'm working on Magento 2.1.0
PHP Warning: Uncaught Exception: Warning: require(/var/www/vhosts/a.com/httpdocs/setup/config/application.config.php): failed to open stream: No such file or directory in /var/www/vhosts/a.com/httpdocs/vendor/magento/framework/Console/Cli.php on line 57 in /var/www/vhosts/a.com/httpdocs/vendor/magento/framework/App/ErrorHandler.php:61