I just killed the processes for you and turned off nodejs on your account.
You can disable node or restart the app yourself in Plesk, but if the processes won't quit when commanded, a root admin would need to kill them for you.
It has finished setting up at this point, but he also had an invalid .htaccess file uploaded. I renamed that and the file is accessible now (though it's empty except for a title tag, so a blank page is to be expected).
https://aggiornamentijw.heliohost.us/index2.html (note the Work_In_Progress page title).