Custom fields - string emply error

[Redpaladin]

Hi!

I put the product into the cart. It does not appear in "size" and "file" and "color" strings on a cash desk. The same is true for an admin interface.
The series is not getting cash for something! Why?
Image:
http://www.kepfeltoltes.eu/images/hdd1/2017/04/25/513picture.jpg

Website:
https://emkeszerkok.hu/szerkok/szerkok-kategoriak/gyermek-polo/szemelyre-szabott-szuletesnapos/gyerek-body-szemelyre-szabva-78-972-1575-1577-1578-1579-1580-1581-1582-1583-1584-reszletek