Upgrade from 8 to 9 users list empty

Hi all,

i have upgraded from 8.1 to 10 and all works fine but in users owncloud show the number of users but it not show the users and if i try to login with a user not admin the user can login but appear blank page

For ownCloud 10 you need to sync the users via occ user:sync. Check either the documentation or the forums for details