Unable to find user

Plzz help me out here, I created users in seafile but when I try to share library seafile failed to search some of the users, it seems that the user are not created in the server, but actually users are present in servers.

What happens when you enter the other users’ email address in their entirety? Can you then share?

If yes, check the cloud mode settings on your server: seahub_settings.py - Seafile Admin Manual