Meal card prepaid

Hello, there is a banking service in Romania, a meal card for example I have a prepaid Visa from UniCredit, which is charged every month with an amount by the employer. I can’t put this card in the Curves. why?

https://support.imaginecurve.com/hc/en-gb/articles/115003215849-Which-cards-can-I-add-to-Curve-?mobile_site=true