Tell us what you are trying to do?
You want to add custom user fields such as phone number and date of birth to the user form.
I got an error message in custom user field that "There is a problem with gender field. Please check CRED form."
See the capture file.
The fields could either be removed or Toolset Types not active, or the Fields are there and Types is active, but the Fields are assigned to another Post type.
I could tell precisely why this happens if I log in, for this I'd need log in details to the site for which I enabled a private reply below
However, I think if you check the Toolset > Custom Fields screen and open the Field Group in question maybe you can already spot if this group is deactivated, or somehow else faulty.
Can you see the fields in the backend when editing the user profile?