Hi Lucie,
I was trying to check, I could not log in with the details.
From the looks of the form, those fields are named with some numeric suffixes, such as: field_53, field_54, field_120 etc..
Under the General Options -> User search panel, I would try to search for “field_” string, to see if they pop-up: https://i.imgur.com/uIvBpit.png
..and then select them to search.
