No "Profile Custom Fields"

Joomla: 3.9.1
EasySocial: 2.2.5

Hello,
i want to create custom profile fields.

At your page i found this information:
https://stackideas.com/docs/easysocial/administrators/profile-types/profile-custom-fields

There is this note:
This custom fields section can be accessed by navigating to Components > EasySocial > Profile Types > (Registered Users) > Custom Fields.

But on our site, i can not find the tab "Custom Fields" (see screenshot).

Did I forget to activate something to make this tab appear or is this really a error?

Thanks

Kind regards
Simon