Hi,
Easy Profile extends Joomla user profile, Joomla required name field so Easy Profile add name filed as hidden input den default field group (core group).

To solve this you can add some field on default field group.

If this is not a problem please post me you site details. You can use the form below the reply in site details tab.

Ok the problem is this:
when user register see these fields groups:
- Benutzerkonto
- Managerprofil

The default group (Kontaktdaten) is a core group and is mandatory on registration and edit profile.
This is a core group and contain some required Joomla fields (hidden)

Does this mean that I Need to make any Field of the default group visible on registration and it will work?

You can do this:
- Move all fields in "Benutzerkonto" group to "Kontaktdaten" group
- Move all fields in "Kontaktdaten" group to "Benutzerkonto" group
- Rename groups

Now in registration and edit profile you have default core group

Thanks, I will try tomorrow and provide you with the result.