Problema para agregar un dominio

Estoy tratando de agregar este dominio a cloudflare, pero cuando intento seleccionar el plan free me sale un mensaje que dice: Refer to https://cfl.re/3VUQyyL for assistance. The zone you are trying to upgrade is marked as Do Not Upgrade. (Code: 1315) y no me permite agregarlo

Hi there,

Please open a billing ticket from your dashboard, so our billing team can take a look.

Take care.