What is it and can I fix it? I have to mention that I registered a .nohost domain when I created the new VPS but then I restored the users and settings form the old server so the .nohost domain is not in my list anymore, nor do I need it. Can it be related to that?
You provided only the title of the email, not the actual content, therefore we don’t know what is the actual error message … and it’s always better to fill the support template …
But random guess from what you explain is that your .nohost.me is not there anymore, and therefore this cron should not exists anymore and can be manually deleted (though it should have been automagically deleted)