This is a 1st step of 404 error. Please check your cpanel file manager. ensure that your main folder exist index.html/.php file. Then ensure permission check box is okay or not.
if not solved try to modify .htaccess file if haven't enough expericences contact with us. Create a support ticket. go to https://my.hostorio.com
Thanks for contcting with us
Regards,
Arif Billah
