Sorry that another mod didn't see this before now, your post was being flagged for moderation. I approved your original post and also moved the thread to the correct forum as the "Error Reports" sub-forum is for the Zimbra Desktop application.
If you are still interested in fixing the system, the problem isn't that the zimlets are installed, but rather that they are NOT installed. It looks like somebody got the schema installed in the LDAP database, but then didn't install the admin extensions that know that user accounts need the extra attributes.
You might be able to reverse the steps in
this section and get the admin interface able to manage users again (if you can access it).
If you are still locked out of the admin interface, do you see any errors in the logs when you try to access it? Some places to check would be:
Code:
/var/log/zimbra.log
/opt/zimbra/mailbox.log
/opt/zimbra/audit.log