Errors in my cron jobs

[kinnth]

I had a contractor work on one of my sites and he seems to have broken my vesta user permissions. I am now getting emails of cron jobs that fail because either the user doesn't exist or doesn't have access to the folders.

Error: vesta update failed
Error: vesta-nginx update failed
Error: vesta-php update failed

What's the best way to reset or grant the correct permissions again for these users?

[ScIT]

Don't understand it: This commands seems to be run in admin user normaly. So what you've changed to the systems? If you work on a normal web user, it should not break the whole permission settings. Please add more informations to your problem.