Question

My daughter tried to add her daughter on her profile but could not.

Comments

Just get her to sign the honor code and volunteer. Become a WikiTree genealogist as well and she should be fine.

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I notice that your daughter is not connected to you as her father.  You can connect her by using "add children" on your edit page.  Or she can connect you by using "add father" on her edit page. She does need to sign the honor code and volunteer to be able to edit.

Answer 1

See Family Members at:  https://www.wikitree.com/wiki/Member_Types#Family_Members

If you added her profile, and she is not on the Trusted List, she wouldn't be able to edit.

Family Members need to be on the Trusted List to edit a profile. (Wiki Genealogists can edit any Open profile.)