This message will appear if you are trying to open Zoolz while you are logged into another Windows user account, not the same administrator Windows user account you were logged into it when you installed Zoolz on this machine in the first place.

Error

 

However, even though you will not be able to open Zoolz from this user account you are logged in to, Zoolz will still be running and backing up your data at the scheduled time. So, when you log in to the administrator user account, you will notice that the backup did not stop.