Well, no because for each try to access the website I got one of these:
08.01.2018 08:53:34 … PHP Fatal error: require_once(): Failed opening required ‘/mnt/web011/e2/59/56953559/htdocs/WordPress_SecureMode_01/wp-content/plugins/mailpoet/vendor/composer/autoload_real.php’ (include_path=’.:/opt/RZphp56/includes’) in /mnt/web011/e2/59/56953559/htdocs/WordPress_SecureMode_01/wp-content/plugins/mailpoet/vendor/autoload.php on line 5
And after I removed the autoload file it was gone. What else is there to do?